61258655664646 has 24 divisors (see below), whose sum is σ = 101393840850120. Its totient is φ = 27736497761280.

The previous prime is 61258655664629. The next prime is 61258655664709. The reversal of 61258655664646 is 64646655685216.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 492418236 + ... + 492542623.

It is an arithmetic number, because the mean of its divisors is an integer number (4224743368755).

Almost surely, 2^{61258655664646} is an apocalyptic number.

61258655664646 is a deficient number, since it is larger than the sum of its proper divisors (40135185185474).

61258655664646 is a wasteful number, since it uses less digits than its factorization.

61258655664646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 984961140 (or 984961129 counting only the distinct ones).

The product of its digits is 1492992000, while the sum is 70.

The spelling of 61258655664646 in words is "sixty-one trillion, two hundred fifty-eight billion, six hundred fifty-five million, six hundred sixty-four thousand, six hundred forty-six".