61994446880 has 48 divisors (see below), whose sum is σ = 150034137624. Its totient is φ = 24192952320.

The previous prime is 61994446879. The next prime is 61994446903. The reversal of 61994446880 is 8864449916.

It can be written as a sum of positive squares in 4 ways, for example, as 50655604624 + 11338842256 = 225068^2 + 106484^2 .

It is a super-2 number, since 2×61994446880² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4718627 + ... + 4731746.

Almost surely, 2^61994446880 is an apocalyptic number.

It is an amenable number.

61994446880 is an abundant number, since it is smaller than the sum of its proper divisors (88039690744).

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

61994446880 is a wasteful number, since it uses less digits than its factorization.

61994446880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9450429 (or 9450421 counting only the distinct ones).

The product of its (nonzero) digits is 11943936, while the sum is 59.

The spelling of 61994446880 in words is "sixty-one billion, nine hundred ninety-four million, four hundred forty-six thousand, eight hundred eighty".