1277223556 has 12 divisors (see below), whose sum is σ = 2554447168. Its totient is φ = 547381512.

The previous prime is 1277223547. The next prime is 1277223569. The reversal of 1277223556 is 6553227721.

1277223556 is an admirable number.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22807536 + ... + 22807591.

Almost surely, 2^1277223556 is an apocalyptic number.

It is an amenable number.

1277223556 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1277223556 is a wasteful number, since it uses less digits than its factorization.

1277223556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45615138 (or 45615136 counting only the distinct ones).

The product of its digits is 176400, while the sum is 40.

The square root of 1277223556 is about 35738.2645913312. The cubic root of 1277223556 is about 1084.9814337044.

The spelling of 1277223556 in words is "one billion, two hundred seventy-seven million, two hundred twenty-three thousand, five hundred fifty-six".