77845212265 has 16 divisors (see below), whose sum is σ = 98598769920. Its totient is φ = 58837691520.

The previous prime is 77845212253. The next prime is 77845212271. The reversal of 77845212265 is 56221254877.

It is not a de Polignac number, because 77845212265 - 2¹⁵ = 77845179497 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1081516 + ... + 1151245.

It is an arithmetic number, because the mean of its divisors is an integer number (6162423120).

Almost surely, 2^77845212265 is an apocalyptic number.

It is an amenable number.

77845212265 is a deficient number, since it is larger than the sum of its proper divisors (20753557655).

77845212265 is a wasteful number, since it uses less digits than its factorization.

77845212265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2233152.

The product of its digits is 1881600, while the sum is 49.

The spelling of 77845212265 in words is "seventy-seven billion, eight hundred forty-five million, two hundred twelve thousand, two hundred sixty-five".