61776967164 has 24 divisors (see below), whose sum is σ = 157250462208. Its totient is φ = 18720293040.

The previous prime is 61776967111. The next prime is 61776967181. The reversal of 61776967164 is 46176967716.

It is a junction number, because it is equal to n+sod(n) for n = 61776967098 and 61776967107.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 234003532 + ... + 234003795.

It is an arithmetic number, because the mean of its divisors is an integer number (6552102592).

Almost surely, 2^61776967164 is an apocalyptic number.

It is an amenable number.

61776967164 is an abundant number, since it is smaller than the sum of its proper divisors (95473495044).

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

61776967164 is a wasteful number, since it uses less digits than its factorization.

61776967164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 468007345 (or 468007343 counting only the distinct ones).

The product of its digits is 16003008, while the sum is 60.

The spelling of 61776967164 in words is "sixty-one billion, seven hundred seventy-six million, nine hundred sixty-seven thousand, one hundred sixty-four".