61997349704 has 8 divisors (see below), whose sum is σ = 116245030710. Its totient is φ = 30998674848.

The previous prime is 61997349703. The next prime is 61997349707. The reversal of 61997349704 is 40794379916.

It can be written as a sum of positive squares in only one way, i.e., 33270489604 + 28726860100 = 182402^2 + 169490^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (61997349703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3874834349 + ... + 3874834364.

Almost surely, 2^61997349704 is an apocalyptic number.

It is an amenable number.

61997349704 is a deficient number, since it is larger than the sum of its proper divisors (54247681006).

61997349704 is a wasteful number, since it uses less digits than its factorization.

61997349704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7749668719 (or 7749668715 counting only the distinct ones).

The product of its (nonzero) digits is 10287648, while the sum is 59.

The spelling of 61997349704 in words is "sixty-one billion, nine hundred ninety-seven million, three hundred forty-nine thousand, seven hundred four".