155642372400 has 60 divisors (see below), whose sum is σ = 498574403432. Its totient is φ = 41504632320.

The previous prime is 155642372393. The next prime is 155642372419. The reversal of 155642372400 is 4273246551.

It is a tau number, because it is divible by the number of its divisors (60).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 64849789 + ... + 64852188.

Almost surely, 2^155642372400 is an apocalyptic number.

155642372400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155642372400 is an abundant number, since it is smaller than the sum of its proper divisors (342932031032).

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

155642372400 is a wasteful number, since it uses less digits than its factorization.

155642372400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129701998 (or 129701987 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 39.

The spelling of 155642372400 in words is "one hundred fifty-five billion, six hundred forty-two million, three hundred seventy-two thousand, four hundred".