138777651265 has 16 divisors (see below), whose sum is σ = 183370443840. Its totient is φ = 99985933120.

The previous prime is 138777651253. The next prime is 138777651293. The reversal of 138777651265 is 562156777831.

It is not a de Polignac number, because 138777651265 - 2³¹ = 136630167617 is a prime.

It is a super-2 number, since 2×138777651265² (a number of 23 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, 11784910 + ... + 11796679.

It is an arithmetic number, because the mean of its divisors is an integer number (11460652740).

Almost surely, 2^138777651265 is an apocalyptic number.

It is an amenable number.

138777651265 is a deficient number, since it is larger than the sum of its proper divisors (44592792575).

138777651265 is a wasteful number, since it uses less digits than its factorization.

138777651265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23581712.

The product of its digits is 14817600, while the sum is 58.

The spelling of 138777651265 in words is "one hundred thirty-eight billion, seven hundred seventy-seven million, six hundred fifty-one thousand, two hundred sixty-five".