61971177117916 has 24 divisors (see below), whose sum is σ = 119929276769904. Its totient is φ = 27782844036480.

The previous prime is 61971177117911. The next prime is 61971177117929.

61971177117916 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 (61971177117911) 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, 9646817635 + ... + 9646824058.

It is an arithmetic number, because the mean of its divisors is an integer number (4997053198746).

Almost surely, 2^{61971177117916} is an apocalyptic number.

It is an amenable number.

61971177117916 is a deficient number, since it is larger than the sum of its proper divisors (57958099651988).

61971177117916 is a wasteful number, since it uses less digits than its factorization.

61971177117916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19293641781 (or 19293641779 counting only the distinct ones).

The product of its digits is 7001316, while the sum is 64.

The spelling of 61971177117916 in words is "sixty-one trillion, nine hundred seventy-one billion, one hundred seventy-seven million, one hundred seventeen thousand, nine hundred sixteen".