616877778616 has 32 divisors (see below), whose sum is σ = 1274803674480. Its totient is φ = 277508275200.

The previous prime is 616877778613. The next prime is 616877778661.

616877778616 is nontrivially palindromic in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (616877778613) 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, 36125355 + ... + 36142426.

Almost surely, 2^616877778616 is an apocalyptic number.

It is an amenable number.

616877778616 is an abundant number, since it is smaller than the sum of its proper divisors (657925895864).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

616877778616 is a wasteful number, since it uses less digits than its factorization.

616877778616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72267895 (or 72267891 counting only the distinct ones).

The product of its digits is 199148544, while the sum is 70.

The spelling of 616877778616 in words is "six hundred sixteen billion, eight hundred seventy-seven million, seven hundred seventy-eight thousand, six hundred sixteen".