61115500015 has 8 divisors (see below), whose sum is σ = 75867517440. Its totient is φ = 47206455072.

The previous prime is 61115499961. The next prime is 61115500037. The reversal of 61115500015 is 51000551116.

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

It is a cyclic number.

It is not a de Polignac number, because 61115500015 - 2¹³ = 61115491823 is a prime.

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, 210742959 + ... + 210743248.

It is an arithmetic number, because the mean of its divisors is an integer number (9483439680).

Almost surely, 2^61115500015 is an apocalyptic number.

61115500015 is a deficient number, since it is larger than the sum of its proper divisors (14752017425).

61115500015 is a wasteful number, since it uses less digits than its factorization.

61115500015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 421486241.

The product of its (nonzero) digits is 750, while the sum is 25.

The spelling of 61115500015 in words is "sixty-one billion, one hundred fifteen million, five hundred thousand, fifteen".