128493897124 has 6 divisors (see below), whose sum is σ = 224864319974. Its totient is φ = 64246948560.

The previous prime is 128493897019. The next prime is 128493897139. The reversal of 128493897124 is 421798394821.

It can be written as a sum of positive squares in only one way, i.e., 124022300224 + 4471596900 = 352168^2 + 66870^2 .

It is a super-2 number, since 2×128493897124² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16061737137 + ... + 16061737144.

Almost surely, 2^128493897124 is an apocalyptic number.

It is an amenable number.

128493897124 is a deficient number, since it is larger than the sum of its proper divisors (96370422850).

128493897124 is a wasteful number, since it uses less digits than its factorization.

128493897124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32123474285 (or 32123474283 counting only the distinct ones).

The product of its digits is 6967296, while the sum is 58.

The spelling of 128493897124 in words is "one hundred twenty-eight billion, four hundred ninety-three million, eight hundred ninety-seven thousand, one hundred twenty-four".