128949926902 has 32 divisors (see below), whose sum is σ = 208710950400. Its totient is φ = 59559477408.

The previous prime is 128949926873. The next prime is 128949926933. The reversal of 128949926902 is 209629949821.

It is a super-2 number, since 2×128949926902² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 346233 + ... + 614635.

It is an arithmetic number, because the mean of its divisors is an integer number (6522217200).

Almost surely, 2^128949926902 is an apocalyptic number.

128949926902 is a deficient number, since it is larger than the sum of its proper divisors (79761023498).

128949926902 is a wasteful number, since it uses less digits than its factorization.

128949926902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268740.

The product of its (nonzero) digits is 10077696, while the sum is 61.

The spelling of 128949926902 in words is "one hundred twenty-eight billion, nine hundred forty-nine million, nine hundred twenty-six thousand, nine hundred two".