61115171502 has 72 divisors (see below), whose sum is σ = 156287530728. Its totient is φ = 15874061280.

The previous prime is 61115171501. The next prime is 61115171519. The reversal of 61115171502 is 20517151116.

It is a self number, because there is not a number n which added to its sum of digits gives 61115171502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61115171501) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 823413 + ... + 894560.

It is an arithmetic number, because the mean of its divisors is an integer number (2170660149).

Almost surely, 2^61115171502 is an apocalyptic number.

61115171502 is an abundant number, since it is smaller than the sum of its proper divisors (95172359226).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61115171502 is a wasteful number, since it uses less digits than its factorization.

61115171502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1718014 (or 1717996 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 30.

The spelling of 61115171502 in words is "sixty-one billion, one hundred fifteen million, one hundred seventy-one thousand, five hundred two".