139730178025 has 9 divisors (see below), whose sum is σ = 173267738373. Its totient is φ = 111782647200.

The previous prime is 139730177969. The next prime is 139730178037. The reversal of 139730178025 is 520871037931.

The square root of 139730178025 is 373805.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 16952821209 + 122777356816 = 130203^2 + 350396^2 .

It is not a de Polignac number, because 139730178025 - 2⁷ = 139730177897 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1831645 + ... + 1906405.

Almost surely, 2^139730178025 is an apocalyptic number.

139730178025 is the 373805-th square number.

139730178025 is the 186903-rd centered octagonal number.

It is an amenable number.

139730178025 is a deficient number, since it is larger than the sum of its proper divisors (33537560348).

139730178025 is an frugal number, since it uses more digits than its factorization.

139730178025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149532 (or 74766 counting only the distinct ones).

The product of its (nonzero) digits is 317520, while the sum is 46.

The spelling of 139730178025 in words is "one hundred thirty-nine billion, seven hundred thirty million, one hundred seventy-eight thousand, twenty-five".