139494917665 has 16 divisors (see below), whose sum is σ = 171536803200. Its totient is φ = 108835908480.

The previous prime is 139494917663. The next prime is 139494917719. The reversal of 139494917665 is 566719494931.

It is not a de Polignac number, because 139494917665 - 2¹ = 139494917663 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 139494917597 and 139494917606.

It is not an unprimeable number, because it can be changed into a prime (139494917663) 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, 473986 + ... + 709684.

It is an arithmetic number, because the mean of its divisors is an integer number (10721050200).

Almost surely, 2^139494917665 is an apocalyptic number.

It is an amenable number.

139494917665 is a deficient number, since it is larger than the sum of its proper divisors (32041885535).

139494917665 is a wasteful number, since it uses less digits than its factorization.

139494917665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238632.

The product of its digits is 44089920, while the sum is 64.

The spelling of 139494917665 in words is "one hundred thirty-nine billion, four hundred ninety-four million, nine hundred seventeen thousand, six hundred sixty-five".