1265257055634 has 32 divisors (see below), whose sum is σ = 2972911685184. Its totient is φ = 353918057280.

The previous prime is 1265257055617. The next prime is 1265257055653. The reversal of 1265257055634 is 4365507525621.

It is a super-2 number, since 2×1265257055634² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 737328429 + ... + 737330144.

It is an arithmetic number, because the mean of its divisors is an integer number (92903490162).

Almost surely, 2^{1265257055634} is an apocalyptic number.

1265257055634 is an abundant number, since it is smaller than the sum of its proper divisors (1707654629550).

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

1265257055634 is a wasteful number, since it uses less digits than its factorization.

1265257055634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1474658602.

The product of its (nonzero) digits is 7560000, while the sum is 51.

The spelling of 1265257055634 in words is "one trillion, two hundred sixty-five billion, two hundred fifty-seven million, fifty-five thousand, six hundred thirty-four".