7949561572138 has 8 divisors (see below), whose sum is σ = 11924448818688. Its totient is φ = 3974745299244.

The previous prime is 7949561572123. The next prime is 7949561572213. The reversal of 7949561572138 is 8312751659497.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17462506 + ... + 17911957.

It is an arithmetic number, because the mean of its divisors is an integer number (1490556102336).

Almost surely, 2^{7949561572138} is an apocalyptic number.

7949561572138 is a deficient number, since it is larger than the sum of its proper divisors (3974887246550).

7949561572138 is a wasteful number, since it uses less digits than its factorization.

7949561572138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35486828.

The product of its digits is 114307200, while the sum is 67.

The spelling of 7949561572138 in words is "seven trillion, nine hundred forty-nine billion, five hundred sixty-one million, five hundred seventy-two thousand, one hundred thirty-eight".