61015107007215 has 80 divisors (see below), whose sum is σ = 109438856714880. Its totient is φ = 32522466893760.

The previous prime is 61015107007213. The next prime is 61015107007229. The reversal of 61015107007215 is 51270070151016.

It is a happy number.

61015107007215 is a `hidden beast` number, since 6 + 1 + 0 + 1 + 510 + 70 + 0 + 72 + 1 + 5 = 666.

It is not a de Polignac number, because 61015107007215 - 2¹ = 61015107007213 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61015107007215.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61015107007213) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 9285509880 + ... + 9285516450.

It is an arithmetic number, because the mean of its divisors is an integer number (1367985708936).

Almost surely, 2^{61015107007215} is an apocalyptic number.

61015107007215 is a deficient number, since it is larger than the sum of its proper divisors (48423749707665).

61015107007215 is a wasteful number, since it uses less digits than its factorization.

61015107007215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16434 (or 16425 counting only the distinct ones).

The product of its (nonzero) digits is 14700, while the sum is 36.

The spelling of 61015107007215 in words is "sixty-one trillion, fifteen billion, one hundred seven million, seven thousand, two hundred fifteen".