137638777765 has 8 divisors (see below), whose sum is σ = 165170147328. Its totient is φ = 110108612880.

The previous prime is 137638777733. The next prime is 137638777831. The reversal of 137638777765 is 567777836731.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 137638777765 - 2⁵ = 137638777733 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 137638777765.

It is a congruent number.

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, 27141 + ... + 525370.

It is an arithmetic number, because the mean of its divisors is an integer number (20646268416).

Almost surely, 2^137638777765 is an apocalyptic number.

It is an amenable number.

137638777765 is a deficient number, since it is larger than the sum of its proper divisors (27531369563).

137638777765 is an equidigital number, since it uses as much as digits as its factorization.

137638777765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 602339.

The product of its digits is 217818720, while the sum is 67.

The spelling of 137638777765 in words is "one hundred thirty-seven billion, six hundred thirty-eight million, seven hundred seventy-seven thousand, seven hundred sixty-five".