13256551770 has 64 divisors (see below), whose sum is σ = 39666364416. Its totient is φ = 2754607680.

The previous prime is 13256551751. The next prime is 13256551783. The reversal of 13256551770 is 7715565231.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2867074 + ... + 2871693.

It is an arithmetic number, because the mean of its divisors is an integer number (619786944).

Almost surely, 2^13256551770 is an apocalyptic number.

13256551770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13256551770 is an abundant number, since it is smaller than the sum of its proper divisors (26409812646).

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

13256551770 is a wasteful number, since it uses less digits than its factorization.

13256551770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5738795.

The product of its (nonzero) digits is 220500, while the sum is 42.

The spelling of 13256551770 in words is "thirteen billion, two hundred fifty-six million, five hundred fifty-one thousand, seven hundred seventy".