155632456728 has 64 divisors (see below), whose sum is σ = 494071296000. Its totient is φ = 44466415776.

The previous prime is 155632456717. The next prime is 155632456729. The reversal of 155632456728 is 827654236551.

155632456728 is a `hidden beast` number, since 1 + 5 + 56 + 3 + 2 + 4 + 567 + 28 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155632456729) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51464248 + ... + 51467271.

It is an arithmetic number, because the mean of its divisors is an integer number (7719864000).

Almost surely, 2^155632456728 is an apocalyptic number.

155632456728 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

155632456728 is an abundant number, since it is smaller than the sum of its proper divisors (338438839272).

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

155632456728 is a wasteful number, since it uses less digits than its factorization.

155632456728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102931541 (or 102931531 counting only the distinct ones).

The product of its digits is 12096000, while the sum is 54.

The spelling of 155632456728 in words is "one hundred fifty-five billion, six hundred thirty-two million, four hundred fifty-six thousand, seven hundred twenty-eight".