61215922945 has 8 divisors (see below), whose sum is σ = 75167459136. Its totient is φ = 47833837296.

The previous prime is 61215922919. The next prime is 61215922961. The reversal of 61215922945 is 54922951216.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61215922945 - 2³³ = 52625988353 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61215922895 and 61215922904.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 142362397 + ... + 142362826.

It is an arithmetic number, because the mean of its divisors is an integer number (9395932392).

Almost surely, 2^61215922945 is an apocalyptic number.

It is an amenable number.

61215922945 is a deficient number, since it is larger than the sum of its proper divisors (13951536191).

61215922945 is a wasteful number, since it uses less digits than its factorization.

61215922945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284725271.

The product of its digits is 388800, while the sum is 46.

The spelling of 61215922945 in words is "sixty-one billion, two hundred fifteen million, nine hundred twenty-two thousand, nine hundred forty-five".