61215425959968 has 72 divisors (see below), whose sum is σ = 198950134376448. Its totient is φ = 17490121702272.

The previous prime is 61215425959903. The next prime is 61215425959981. The reversal of 61215425959968 is 86995952451216.

61215425959968 is a `hidden beast` number, since 6 + 1 + 2 + 1 + 5 + 4 + 25 + 9 + 599 + 6 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a super-2 number, since 2×61215425959968² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a junction number, because it is equal to n+sod(n) for n = 61215425959896 and 61215425959905.

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, 15182395296 + ... + 15182399327.

It is an arithmetic number, because the mean of its divisors is an integer number (2763196310784).

Almost surely, 2^{61215425959968} is an apocalyptic number.

It is an amenable number.

61215425959968 is an abundant number, since it is smaller than the sum of its proper divisors (137734708416480).

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

61215425959968 is a wasteful number, since it uses less digits than its factorization.

61215425959968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30364794646 (or 30364794635 counting only the distinct ones).

The product of its digits is 419904000, while the sum is 72.

The spelling of 61215425959968 in words is "sixty-one trillion, two hundred fifteen billion, four hundred twenty-five million, nine hundred fifty-nine thousand, nine hundred sixty-eight".