1277704920408 has 64 divisors (see below), whose sum is σ = 3663485218560. Its totient is φ = 363768575616.

The previous prime is 1277704920407. The next prime is 1277704920413. The reversal of 1277704920408 is 8040294077721.

It is a super-2 number, since 2×1277704920408² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1277704920407) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13389535 + ... + 13484622.

It is an arithmetic number, because the mean of its divisors is an integer number (57241956540).

Almost surely, 2^{1277704920408} is an apocalyptic number.

It is an amenable number.

1277704920408 is an abundant number, since it is smaller than the sum of its proper divisors (2385780298152).

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

1277704920408 is a wasteful number, since it uses less digits than its factorization.

1277704920408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26874456 (or 26874452 counting only the distinct ones).

The product of its (nonzero) digits is 1580544, while the sum is 51.

The spelling of 1277704920408 in words is "one trillion, two hundred seventy-seven billion, seven hundred four million, nine hundred twenty thousand, four hundred eight".