77207918889 has 8 divisors (see below), whose sum is σ = 102945922272. Its totient is φ = 51470930720.

The previous prime is 77207918849. The next prime is 77207918917. The reversal of 77207918889 is 98881970277.

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 77207918889 - 2¹⁵ = 77207886121 is a prime.

It is a super-2 number, since 2×77207918889² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (77207918839) 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, 53844 + ... + 396629.

It is an arithmetic number, because the mean of its divisors is an integer number (12868240284).

Almost surely, 2^77207918889 is an apocalyptic number.

It is an amenable number.

77207918889 is a deficient number, since it is larger than the sum of its proper divisors (25738003383).

77207918889 is a wasteful number, since it uses less digits than its factorization.

77207918889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 507607.

The product of its (nonzero) digits is 28449792, while the sum is 66.

The spelling of 77207918889 in words is "seventy-seven billion, two hundred seven million, nine hundred eighteen thousand, eight hundred eighty-nine".