128087837522 has 18 divisors (see below), whose sum is σ = 200866764567. Its totient is φ = 61253833036.

The previous prime is 128087837491. The next prime is 128087837531. The reversal of 128087837522 is 225738780821.

It can be written as a sum of positive squares in only one way, i.e., 64043918761 + 64043918761 = 253069^2 + 253069^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=253069.

It is a super-2 number, since 2×128087837522² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 11635673 + ... + 11646675.

Almost surely, 2^128087837522 is an apocalyptic number.

128087837522 is a deficient number, since it is larger than the sum of its proper divisors (72778927045).

128087837522 is an frugal number, since it uses more digits than its factorization.

128087837522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22054 (or 11028 counting only the distinct ones).

The product of its (nonzero) digits is 3010560, while the sum is 53.

The spelling of 128087837522 in words is "one hundred twenty-eight billion, eighty-seven million, eight hundred thirty-seven thousand, five hundred twenty-two".