61955387612 has 24 divisors (see below), whose sum is σ = 110218674720. Its totient is φ = 30464516160.

The previous prime is 61955387597. The next prime is 61955387617. The reversal of 61955387612 is 21678355916.

It is a happy number.

61955387612 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 not an unprimeable number, because it can be changed into a prime (61955387617) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1618073 + ... + 1655919.

It is an arithmetic number, because the mean of its divisors is an integer number (4592444780).

Almost surely, 2^61955387612 is an apocalyptic number.

It is an amenable number.

61955387612 is a deficient number, since it is larger than the sum of its proper divisors (48263287108).

61955387612 is a wasteful number, since it uses less digits than its factorization.

61955387612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44621 (or 44619 counting only the distinct ones).

The product of its digits is 2721600, while the sum is 53.

The spelling of 61955387612 in words is "sixty-one billion, nine hundred fifty-five million, three hundred eighty-seven thousand, six hundred twelve".