61510166661015 has 48 divisors (see below), whose sum is σ = 113386076949600. Its totient is φ = 30758420791296.

The previous prime is 61510166661007. The next prime is 61510166661071. The reversal of 61510166661015 is 51016666101516.

It is not a de Polignac number, because 61510166661015 - 2³ = 61510166661007 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 an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 370750650 + ... + 370916519.

It is an arithmetic number, because the mean of its divisors is an integer number (2362209936450).

Almost surely, 2^{61510166661015} is an apocalyptic number.

61510166661015 is a deficient number, since it is larger than the sum of its proper divisors (51875910288585).

61510166661015 is a wasteful number, since it uses less digits than its factorization.

61510166661015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 741667296 (or 741667293 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 45.

The spelling of 61510166661015 in words is "sixty-one trillion, five hundred ten billion, one hundred sixty-six million, six hundred sixty-one thousand, fifteen".