156028857221490 has 64 divisors (see below), whose sum is σ = 411630328783872. Its totient is φ = 37536435684800.

The previous prime is 156028857221459. The next prime is 156028857221519. The reversal of 156028857221490 is 94122758820651.

It is a super-2 number, since 2×156028857221490² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1804593102 + ... + 1804679561.

It is an arithmetic number, because the mean of its divisors is an integer number (6431723887248).

Almost surely, 2^{156028857221490} is an apocalyptic number.

156028857221490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

156028857221490 is an abundant number, since it is smaller than the sum of its proper divisors (255601471562382).

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

156028857221490 is a wasteful number, since it uses less digits than its factorization.

156028857221490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3609272815.

The product of its (nonzero) digits is 19353600, while the sum is 60.

The spelling of 156028857221490 in words is "one hundred fifty-six trillion, twenty-eight billion, eight hundred fifty-seven million, two hundred twenty-one thousand, four hundred ninety".