1621365150243 has 8 divisors (see below), whose sum is σ = 2171514462208. Its totient is φ = 1076062969224.

The previous prime is 1621365150191. The next prime is 1621365150253. The reversal of 1621365150243 is 3420515631261.

It is a happy number.

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

It is not a de Polignac number, because 1621365150243 - 2⁹ = 1621365149731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1621365150253) 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, 1211781955 + ... + 1211783292.

It is an arithmetic number, because the mean of its divisors is an integer number (271439307776).

Almost surely, 2^{1621365150243} is an apocalyptic number.

1621365150243 is a deficient number, since it is larger than the sum of its proper divisors (550149311965).

1621365150243 is a wasteful number, since it uses less digits than its factorization.

1621365150243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2423565473.

The product of its (nonzero) digits is 129600, while the sum is 39.

The spelling of 1621365150243 in words is "one trillion, six hundred twenty-one billion, three hundred sixty-five million, one hundred fifty thousand, two hundred forty-three".