137554581561 has 16 divisors (see below), whose sum is σ = 193094711040. Its totient is φ = 86860535760.

The previous prime is 137554581553. The next prime is 137554581581. The reversal of 137554581561 is 165185455731.

It is not a de Polignac number, because 137554581561 - 2³ = 137554581553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (137554581581) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 92466 + ... + 532596.

It is an arithmetic number, because the mean of its divisors is an integer number (12068419440).

Almost surely, 2^137554581561 is an apocalyptic number.

It is an amenable number.

137554581561 is a deficient number, since it is larger than the sum of its proper divisors (55540129479).

137554581561 is a wasteful number, since it uses less digits than its factorization.

137554581561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 445636.

The product of its digits is 2520000, while the sum is 51.

The spelling of 137554581561 in words is "one hundred thirty-seven billion, five hundred fifty-four million, five hundred eighty-one thousand, five hundred sixty-one".