137513887765 has 4 divisors (see below), whose sum is σ = 165016665324. Its totient is φ = 110011110208.

The previous prime is 137513887759. The next prime is 137513887789. The reversal of 137513887765 is 567788315731.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 104920279396 + 32593608369 = 323914^2 + 180537^2 .

It is a cyclic number.

It is not a de Polignac number, because 137513887765 - 2¹⁷ = 137513756693 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13751388772 + ... + 13751388781.

It is an arithmetic number, because the mean of its divisors is an integer number (41254166331).

Almost surely, 2^137513887765 is an apocalyptic number.

It is an amenable number.

137513887765 is a deficient number, since it is larger than the sum of its proper divisors (27502777559).

137513887765 is an equidigital number, since it uses as much as digits as its factorization.

137513887765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27502777558.

The product of its digits is 29635200, while the sum is 61.

The spelling of 137513887765 in words is "one hundred thirty-seven billion, five hundred thirteen million, eight hundred eighty-seven thousand, seven hundred sixty-five".