155087481972 has 24 divisors (see below), whose sum is σ = 366967564992. Its totient is φ = 50967716800.

The previous prime is 155087481959. The next prime is 155087482001. The reversal of 155087481972 is 279184780551.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 91012929 + ... + 91014632.

It is an arithmetic number, because the mean of its divisors is an integer number (15290315208).

Almost surely, 2^155087481972 is an apocalyptic number.

155087481972 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

155087481972 is an abundant number, since it is smaller than the sum of its proper divisors (211880083020).

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

155087481972 is a wasteful number, since it uses less digits than its factorization.

155087481972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182027639 (or 182027637 counting only the distinct ones).

The product of its (nonzero) digits is 5644800, while the sum is 57.

The spelling of 155087481972 in words is "one hundred fifty-five billion, eighty-seven million, four hundred eighty-one thousand, nine hundred seventy-two".