61515614053631 has 8 divisors (see below), whose sum is σ = 61893612044160. Its totient is φ = 61137623399832.

The previous prime is 61515614053603. The next prime is 61515614053667. The reversal of 61515614053631 is 13635041651516.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61515614053631 is a prime.

It is a super-2 number, since 2×61515614053631² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61515914053631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15487580 + ... + 19049838.

It is an arithmetic number, because the mean of its divisors is an integer number (7736701505520).

Almost surely, 2^{61515614053631} is an apocalyptic number.

61515614053631 is a deficient number, since it is larger than the sum of its proper divisors (377997990529).

61515614053631 is a wasteful number, since it uses less digits than its factorization.

61515614053631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3668365.

The product of its (nonzero) digits is 972000, while the sum is 47.

The spelling of 61515614053631 in words is "sixty-one trillion, five hundred fifteen billion, six hundred fourteen million, fifty-three thousand, six hundred thirty-one".