79857615961535 has 8 divisors (see below), whose sum is σ = 95829201966960. Its totient is φ = 63886050893824.

The previous prime is 79857615961523. The next prime is 79857615961537. The reversal of 79857615961535 is 53516951675897.

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

It is a cyclic number.

It is not a de Polignac number, because 79857615961535 - 2¹⁶ = 79857615895999 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79857615961537) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4962239 + ... + 13577151.

It is an arithmetic number, because the mean of its divisors is an integer number (11978650245870).

Almost surely, 2^{79857615961535} is an apocalyptic number.

79857615961535 is a deficient number, since it is larger than the sum of its proper divisors (15971586005425).

79857615961535 is a wasteful number, since it uses less digits than its factorization.

79857615961535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10468857.

The product of its digits is 2143260000, while the sum is 77.

The spelling of 79857615961535 in words is "seventy-nine trillion, eight hundred fifty-seven billion, six hundred fifteen million, nine hundred sixty-one thousand, five hundred thirty-five".