79401688861 has 8 divisors (see below), whose sum is σ = 86902177824. Its totient is φ = 71948225520.

The previous prime is 79401688853. The next prime is 79401688901. The reversal of 79401688861 is 16888610497.

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 79401688861 - 2³ = 79401688853 is a prime.

It is a super-3 number, since 3×79401688861³ (a number of 34 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 79401688796 and 79401688805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79401688841) 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, 11752870 + ... + 11759623.

It is an arithmetic number, because the mean of its divisors is an integer number (10862772228).

Almost surely, 2^79401688861 is an apocalyptic number.

It is an amenable number.

79401688861 is a deficient number, since it is larger than the sum of its proper divisors (7500488963).

79401688861 is a wasteful number, since it uses less digits than its factorization.

79401688861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23512811.

The product of its (nonzero) digits is 4644864, while the sum is 58.

The spelling of 79401688861 in words is "seventy-nine billion, four hundred one million, six hundred eighty-eight thousand, eight hundred sixty-one".