137581057802 has 4 divisors (see below), whose sum is σ = 206371586706. Its totient is φ = 68790528900.

The previous prime is 137581057781. The next prime is 137581057811. The reversal of 137581057802 is 208750185731.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 208750185731 = 71 ⋅2940143461.

It can be written as a sum of positive squares in only one way, i.e., 137025088561 + 555969241 = 370169^2 + 23579^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34395264449 + ... + 34395264452.

Almost surely, 2^137581057802 is an apocalyptic number.

137581057802 is a deficient number, since it is larger than the sum of its proper divisors (68790528904).

137581057802 is an equidigital number, since it uses as much as digits as its factorization.

137581057802 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68790528903.

The product of its (nonzero) digits is 470400, while the sum is 47.

The spelling of 137581057802 in words is "one hundred thirty-seven billion, five hundred eighty-one million, fifty-seven thousand, eight hundred two".