1277955617226 has 16 divisors (see below), whose sum is σ = 2555973157728. Its totient is φ = 425974885200.

The previous prime is 1277955617189. The next prime is 1277955617251. The reversal of 1277955617226 is 6227165597721.

It is a self number, because there is not a number n which added to its sum of digits gives 1277955617226.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2309665 + ... + 2808996.

It is an arithmetic number, because the mean of its divisors is an integer number (159748322358).

Almost surely, 2^{1277955617226} is an apocalyptic number.

1277955617226 is an abundant number, since it is smaller than the sum of its proper divisors (1278017540502).

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

1277955617226 is a wasteful number, since it uses less digits than its factorization.

1277955617226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5160277.

The product of its digits is 22226400, while the sum is 60.

The spelling of 1277955617226 in words is "one trillion, two hundred seventy-seven billion, nine hundred fifty-five million, six hundred seventeen thousand, two hundred twenty-six".