173139740761 has 24 divisors (see below), whose sum is σ = 203424941720. Its totient is φ = 146354522112.

The previous prime is 173139740747. The next prime is 173139740777. The reversal of 173139740761 is 167047931371.

It is a happy number.

It can be written as a sum of positive squares in 12 ways, for example, as 13655324736 + 159484416025 = 116856^2 + 399355^2 .

It is not a de Polignac number, because 173139740761 - 2⁵ = 173139740729 is a prime.

It is not an unprimeable number, because it can be changed into a prime (173139740701) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 483756 + ... + 761773.

Almost surely, 2^173139740761 is an apocalyptic number.

It is an amenable number.

173139740761 is a deficient number, since it is larger than the sum of its proper divisors (30285200959).

173139740761 is a wasteful number, since it uses less digits than its factorization.

173139740761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1245613 (or 1245596 counting only the distinct ones).

The product of its (nonzero) digits is 666792, while the sum is 49.

The spelling of 173139740761 in words is "one hundred seventy-three billion, one hundred thirty-nine million, seven hundred forty thousand, seven hundred sixty-one".