61776907084144 has 40 divisors (see below), whose sum is σ = 144838294764768. Its totient is φ = 24918416302080.

The previous prime is 61776907084073. The next prime is 61776907084147. The reversal of 61776907084144 is 44148070967716.

It is a super-2 number, since 2×61776907084144² (a number of 28 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (64) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61776907084147) 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, 16222925377 + ... + 16222929184.

Almost surely, 2^{61776907084144} is an apocalyptic number.

It is an amenable number.

61776907084144 is an abundant number, since it is smaller than the sum of its proper divisors (83061387680624).

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

61776907084144 is a wasteful number, since it uses less digits than its factorization.

61776907084144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32445854593 (or 32445854587 counting only the distinct ones).

The product of its (nonzero) digits is 56899584, while the sum is 64.

The spelling of 61776907084144 in words is "sixty-one trillion, seven hundred seventy-six billion, nine hundred seven million, eighty-four thousand, one hundred forty-four".