139742235272644 has 27 divisors (see below), whose sum is σ = 246028996465357. Its totient is φ = 69450765380864.

The previous prime is 139742235272603. The next prime is 139742235272681. The reversal of 139742235272644 is 446272532247931.

The square root of 139742235272644 is 11821262.

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

It can be written as a sum of positive squares in only one way, i.e., 138969439560900 + 772795711744 = 11788530^2 + 879088^2 .

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, 3948283812 + ... + 3948319204.

Almost surely, 2^{139742235272644} is an apocalyptic number.

139742235272644 is the 11821262-nd square number.

It is an amenable number.

139742235272644 is a deficient number, since it is larger than the sum of its proper divisors (106286761192713).

139742235272644 is an frugal number, since it uses more digits than its factorization.

139742235272644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71124 (or 35562 counting only the distinct ones).

The product of its digits is 121927680, while the sum is 61.

The spelling of 139742235272644 in words is "one hundred thirty-nine trillion, seven hundred forty-two billion, two hundred thirty-five million, two hundred seventy-two thousand, six hundred forty-four".