1371137128656 has 40 divisors (see below), whose sum is σ = 3563314474944. Its totient is φ = 454308906240.

The previous prime is 1371137128651. The next prime is 1371137128679. The reversal of 1371137128656 is 6568217311731.

It is a junction number, because it is equal to n+sod(n) for n = 1371137128599 and 1371137128608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1371137128651) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85517005 + ... + 85533036.

Almost surely, 2^{1371137128656} is an apocalyptic number.

1371137128656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1371137128656 is an abundant number, since it is smaller than the sum of its proper divisors (2192177346288).

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

1371137128656 is a wasteful number, since it uses less digits than its factorization.

1371137128656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171050219 (or 171050213 counting only the distinct ones).

The product of its digits is 1270080, while the sum is 51.

The spelling of 1371137128656 in words is "one trillion, three hundred seventy-one billion, one hundred thirty-seven million, one hundred twenty-eight thousand, six hundred fifty-six".