77199579881 has 16 divisors (see below), whose sum is σ = 79365737088. Its totient is φ = 75050908800.

The previous prime is 77199579841. The next prime is 77199579883. The reversal of 77199579881 is 18897599177.

It is a cyclic number.

It is not a de Polignac number, because 77199579881 - 2¹⁸ = 77199317737 is a prime.

It is a super-2 number, since 2×77199579881² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (77199579883) 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, 12454475 + ... + 12460671.

It is an arithmetic number, because the mean of its divisors is an integer number (4960358568).

Almost surely, 2^77199579881 is an apocalyptic number.

It is an amenable number.

77199579881 is a deficient number, since it is larger than the sum of its proper divisors (2166157207).

77199579881 is a wasteful number, since it uses less digits than its factorization.

77199579881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7552.

The product of its digits is 80015040, while the sum is 71.

The spelling of 77199579881 in words is "seventy-seven billion, one hundred ninety-nine million, five hundred seventy-nine thousand, eight hundred eighty-one".