61615992 has 16 divisors (see below), whose sum is σ = 154040040. Its totient is φ = 20538656.

The previous prime is 61615987. The next prime is 61615999. The reversal of 61615992 is 29951616.

It is a self number, because there is not a number n which added to its sum of digits gives 61615992.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61615999) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1283643 + ... + 1283690.

Almost surely, 2^61615992 is an apocalyptic number.

It is an amenable number.

61615992 is an abundant number, since it is smaller than the sum of its proper divisors (92424048).

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

61615992 is a wasteful number, since it uses less digits than its factorization.

61615992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2567342 (or 2567338 counting only the distinct ones).

The product of its digits is 29160, while the sum is 39.

The square root of 61615992 is about 7849.5854667619. The cubic root of 61615992 is about 394.9703379959.

The spelling of 61615992 in words is "sixty-one million, six hundred fifteen thousand, nine hundred ninety-two".