61810940964 has 48 divisors (see below), whose sum is σ = 149254370496. Its totient is φ = 19893744000.

The previous prime is 61810940911. The next prime is 61810941041. The reversal of 61810940964 is 46904901816.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 473187 + ... + 589514.

It is an arithmetic number, because the mean of its divisors is an integer number (3109466052).

Almost surely, 2^61810940964 is an apocalyptic number.

It is an amenable number.

61810940964 is an abundant number, since it is smaller than the sum of its proper divisors (87443429532).

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

61810940964 is a wasteful number, since it uses less digits than its factorization.

61810940964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1062876 (or 1062874 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 48.

The spelling of 61810940964 in words is "sixty-one billion, eight hundred ten million, nine hundred forty thousand, nine hundred sixty-four".