155156837472 has 480 divisors, whose sum is σ = 564134199552. Its totient is φ = 40905368064.

The previous prime is 155156837389. The next prime is 155156837501. The reversal of 155156837472 is 274738651551.

155156837472 is a `hidden beast` number, since 1 + 5 + 5 + 1 + 568 + 3 + 7 + 4 + 72 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 57315543 + ... + 57318249.

Almost surely, 2^155156837472 is an apocalyptic number.

155156837472 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 155156837472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (282067099776).

155156837472 is an abundant number, since it is smaller than the sum of its proper divisors (408977362080).

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

155156837472 is an frugal number, since it uses more digits than its factorization.

155156837472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2764 (or 2732 counting only the distinct ones).

The product of its digits is 7056000, while the sum is 54.

The spelling of 155156837472 in words is "one hundred fifty-five billion, one hundred fifty-six million, eight hundred thirty-seven thousand, four hundred seventy-two".