79850551587 has 4 divisors (see below), whose sum is σ = 106467402120. Its totient is φ = 53233701056.

The previous prime is 79850551579. The next prime is 79850551619. The reversal of 79850551587 is 78515505897.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 79850551587 - 2³ = 79850551579 is a prime.

It is a super-2 number, since 2×79850551587² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 79850551587.

It is not an unprimeable number, because it can be changed into a prime (79850551567) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13308425262 + ... + 13308425267.

It is an arithmetic number, because the mean of its divisors is an integer number (26616850530).

Almost surely, 2^79850551587 is an apocalyptic number.

79850551587 is a deficient number, since it is larger than the sum of its proper divisors (26616850533).

79850551587 is a wasteful number, since it uses less digits than its factorization.

79850551587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26616850532.

The product of its (nonzero) digits is 17640000, while the sum is 60.

The spelling of 79850551587 in words is "seventy-nine billion, eight hundred fifty million, five hundred fifty-one thousand, five hundred eighty-seven".