61500015565 has 8 divisors (see below), whose sum is σ = 73816079328. Its totient is φ = 49189305360.

The previous prime is 61500015553. The next prime is 61500015581. The reversal of 61500015565 is 56551000516.

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

It is not a de Polignac number, because 61500015565 - 2¹¹ = 61500013517 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61500015565.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1313071 + ... + 1359100.

It is an arithmetic number, because the mean of its divisors is an integer number (9227009916).

Almost surely, 2^61500015565 is an apocalyptic number.

It is an amenable number.

61500015565 is a deficient number, since it is larger than the sum of its proper divisors (12316063763).

61500015565 is a wasteful number, since it uses less digits than its factorization.

61500015565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2676779.

The product of its (nonzero) digits is 22500, while the sum is 34.

The spelling of 61500015565 in words is "sixty-one billion, five hundred million, fifteen thousand, five hundred sixty-five".