61089615 has 12 divisors (see below), whose sum is σ = 105888744. Its totient is φ = 32581104.

The previous prime is 61089601. The next prime is 61089647. The reversal of 61089615 is 51698016.

It is not a de Polignac number, because 61089615 - 2⁴ = 61089599 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61089615.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 678729 + ... + 678818.

It is an arithmetic number, because the mean of its divisors is an integer number (8824062).

Almost surely, 2^61089615 is an apocalyptic number.

61089615 is a deficient number, since it is larger than the sum of its proper divisors (44799129).

61089615 is a wasteful number, since it uses less digits than its factorization.

61089615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1357558 (or 1357555 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 61089615 is about 7815.9845828917. The cubic root of 61089615 is about 393.8423940397.

The spelling of 61089615 in words is "sixty-one million, eighty-nine thousand, six hundred fifteen".