1242816161550 has 24 divisors (see below), whose sum is σ = 3082184081016. Its totient is φ = 331417643040.

The previous prime is 1242816161539. The next prime is 1242816161557. The reversal of 1242816161550 is 551616182421.

It is a super-2 number, since 2×1242816161550² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242816161557) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4142720389 + ... + 4142720688.

It is an arithmetic number, because the mean of its divisors is an integer number (128424336709).

Almost surely, 2^{1242816161550} is an apocalyptic number.

1242816161550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1242816161550 is an abundant number, since it is smaller than the sum of its proper divisors (1839367919466).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1242816161550 is a wasteful number, since it uses less digits than its factorization.

1242816161550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8285441092 (or 8285441087 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 42.

The spelling of 1242816161550 in words is "one trillion, two hundred forty-two billion, eight hundred sixteen million, one hundred sixty-one thousand, five hundred fifty".