137640266525 has 6 divisors (see below), whose sum is σ = 170673930522. Its totient is φ = 110112213200.

The previous prime is 137640266503. The next prime is 137640266557. The reversal of 137640266525 is 525662046731.

It can be written as a sum of positive squares in 3 ways, for example, as 1415791129 + 136224475396 = 37627^2 + 369086^2 .

It is not a de Polignac number, because 137640266525 - 2⁶ = 137640266461 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 137640266525.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2752805306 + ... + 2752805355.

It is an arithmetic number, because the mean of its divisors is an integer number (28445655087).

Almost surely, 2^137640266525 is an apocalyptic number.

It is an amenable number.

137640266525 is a deficient number, since it is larger than the sum of its proper divisors (33033663997).

137640266525 is an equidigital number, since it uses as much as digits as its factorization.

137640266525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5505610671 (or 5505610666 counting only the distinct ones).

The product of its (nonzero) digits is 1814400, while the sum is 47.

The spelling of 137640266525 in words is "one hundred thirty-seven billion, six hundred forty million, two hundred sixty-six thousand, five hundred twenty-five".