155991240496 has 60 divisors (see below), whose sum is σ = 378621620832. Its totient is φ = 61710816384.

The previous prime is 155991240479. The next prime is 155991240499. The reversal of 155991240496 is 694042199551.

It is a happy number.

It is a super-2 number, since 2×155991240496² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (155991240499) 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, 7642440 + ... + 7662823.

Almost surely, 2^155991240496 is an apocalyptic number.

155991240496 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

155991240496 is an abundant number, since it is smaller than the sum of its proper divisors (222630380336).

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

155991240496 is a wasteful number, since it uses less digits than its factorization.

155991240496 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15305298 (or 15305285 counting only the distinct ones).

The product of its (nonzero) digits is 3499200, while the sum is 55.

The spelling of 155991240496 in words is "one hundred fifty-five billion, nine hundred ninety-one million, two hundred forty thousand, four hundred ninety-six".