61651656981836 has 12 divisors (see below), whose sum is σ = 107923812685920. Its totient is φ = 30816281928720.

The previous prime is 61651656981763. The next prime is 61651656981899. The reversal of 61651656981836 is 63818965615616.

It is a hoax number, since the sum of its digits (71) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 61651656981836.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2386626020 + ... + 2386651851.

It is an arithmetic number, because the mean of its divisors is an integer number (8993651057160).

Almost surely, 2^{61651656981836} is an apocalyptic number.

It is an amenable number.

61651656981836 is a deficient number, since it is larger than the sum of its proper divisors (46272155704084).

61651656981836 is a wasteful number, since it uses less digits than its factorization.

61651656981836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4773281104 (or 4773281102 counting only the distinct ones).

The product of its digits is 335923200, while the sum is 71.

The spelling of 61651656981836 in words is "sixty-one trillion, six hundred fifty-one billion, six hundred fifty-six million, nine hundred eighty-one thousand, eight hundred thirty-six".