61730268615 has 16 divisors (see below), whose sum is σ = 109742700000. Its totient is φ = 32922809856.

The previous prime is 61730268581. The next prime is 61730268617. The reversal of 61730268615 is 51686203716.

61730268615 is a `hidden beast` number, since 6 + 1 + 7 + 3 + 0 + 26 + 8 + 615 = 666.

It is not a de Polignac number, because 61730268615 - 2¹⁰ = 61730267591 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61730268617) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 228630490 + ... + 228630759.

It is an arithmetic number, because the mean of its divisors is an integer number (6858918750).

Almost surely, 2^61730268615 is an apocalyptic number.

61730268615 is a deficient number, since it is larger than the sum of its proper divisors (48012431385).

61730268615 is a wasteful number, since it uses less digits than its factorization.

61730268615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 457261263 (or 457261257 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

The spelling of 61730268615 in words is "sixty-one billion, seven hundred thirty million, two hundred sixty-eight thousand, six hundred fifteen".