1320155634603 has 8 divisors (see below), whose sum is σ = 1895608090768. Its totient is φ = 812403467424.

The previous prime is 1320155634571. The next prime is 1320155634607. The reversal of 1320155634603 is 3064365510231.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1320155634603 - 2⁵ = 1320155634571 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 33850144477 = 1320155634603 / (1 + 3 + 2 + 0 + 1 + 5 + 5 + 6 + 3 + 4 + 6 + 0 + 3).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1320155634607) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16925072200 + ... + 16925072277.

It is an arithmetic number, because the mean of its divisors is an integer number (236951011346).

Almost surely, 2^{1320155634603} is an apocalyptic number.

1320155634603 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1320155634603 is a deficient number, since it is larger than the sum of its proper divisors (575452456165).

1320155634603 is a wasteful number, since it uses less digits than its factorization.

1320155634603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33850144493.

The product of its (nonzero) digits is 194400, while the sum is 39.

The spelling of 1320155634603 in words is "one trillion, three hundred twenty billion, one hundred fifty-five million, six hundred thirty-four thousand, six hundred three".