61309166996 has 96 divisors (see below), whose sum is σ = 143095341312. Its totient is φ = 22249635840.

The previous prime is 61309166969. The next prime is 61309167037. The reversal of 61309166996 is 69966190316.

61309166996 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 447536 + ... + 568248.

It is an arithmetic number, because the mean of its divisors is an integer number (1490576472).

Almost surely, 2^61309166996 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61309166996, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71547670656).

61309166996 is an abundant number, since it is smaller than the sum of its proper divisors (81786174316).

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

61309166996 is a wasteful number, since it uses less digits than its factorization.

61309166996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120849 (or 120847 counting only the distinct ones).

The product of its (nonzero) digits is 2834352, while the sum is 56.

The spelling of 61309166996 in words is "sixty-one billion, three hundred nine million, one hundred sixty-six thousand, nine hundred ninety-six".