61489015 has 16 divisors (see below), whose sum is σ = 84575232. Its totient is φ = 42040224.

The previous prime is 61489009. The next prime is 61489061. The reversal of 61489015 is 51098416.

It is a cyclic number.

It is not a de Polignac number, because 61489015 - 2³ = 61489007 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10452 + ... + 15238.

It is an arithmetic number, because the mean of its divisors is an integer number (5285952).

Almost surely, 2^61489015 is an apocalyptic number.

61489015 is a deficient number, since it is larger than the sum of its proper divisors (23086217).

61489015 is a wasteful number, since it uses less digits than its factorization.

61489015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5166.

The product of its (nonzero) digits is 8640, while the sum is 34.

The square root of 61489015 is about 7841.4931613820. The cubic root of 61489015 is about 394.6988357591.

The spelling of 61489015 in words is "sixty-one million, four hundred eighty-nine thousand, fifteen".