61166843916 has 48 divisors (see below), whose sum is σ = 144507373920. Its totient is φ = 20135027200.

The previous prime is 61166843911. The next prime is 61166843921. The reversal of 61166843916 is 61934866116.

It is an interprime number because it is at equal distance from previous prime (61166843911) and next prime (61166843921).

It is not an unprimeable number, because it can be changed into a prime (61166843911) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 406600 + ... + 536336.

It is an arithmetic number, because the mean of its divisors is an integer number (3010570290).

Almost surely, 2^61166843916 is an apocalyptic number.

It is an amenable number.

61166843916 is an abundant number, since it is smaller than the sum of its proper divisors (83340530004).

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

61166843916 is a wasteful number, since it uses less digits than its factorization.

61166843916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130234 (or 130232 counting only the distinct ones).

The product of its digits is 1119744, while the sum is 51.

The spelling of 61166843916 in words is "sixty-one billion, one hundred sixty-six million, eight hundred forty-three thousand, nine hundred sixteen".