61538975 has 12 divisors (see below), whose sum is σ = 76434096. Its totient is φ = 49150080.

The previous prime is 61538969. The next prime is 61538987. The reversal of 61538975 is 57983516.

It is not a de Polignac number, because 61538975 - 2¹⁰ = 61537951 is a prime.

It is a Duffinian number.

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, 16919 + ... + 20231.

It is an arithmetic number, because the mean of its divisors is an integer number (6369508).

Almost surely, 2^61538975 is an apocalyptic number.

61538975 is a deficient number, since it is larger than the sum of its proper divisors (14895121).

61538975 is a wasteful number, since it uses less digits than its factorization.

61538975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4066 (or 4061 counting only the distinct ones).

The product of its digits is 226800, while the sum is 44.

The square root of 61538975 is about 7844.6781323391. The cubic root of 61538975 is about 394.8057047970.

The spelling of 61538975 in words is "sixty-one million, five hundred thirty-eight thousand, nine hundred seventy-five".