61536879 has 12 divisors (see below), whose sum is σ = 89477232. Its totient is φ = 40752000.

The previous prime is 61536863. The next prime is 61536911. The reversal of 61536879 is 97863516.

It is a happy number.

It is not a de Polignac number, because 61536879 - 2⁴ = 61536863 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61536479) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21282 + ... + 23999.

It is an arithmetic number, because the mean of its divisors is an integer number (7456436).

Almost surely, 2^61536879 is an apocalyptic number.

61536879 is a deficient number, since it is larger than the sum of its proper divisors (27940353).

61536879 is a wasteful number, since it uses less digits than its factorization.

61536879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45438 (or 45435 counting only the distinct ones).

The product of its digits is 272160, while the sum is 45.

The square root of 61536879 is about 7844.5445374477. The cubic root of 61536879 is about 394.8012224227.

The spelling of 61536879 in words is "sixty-one million, five hundred thirty-six thousand, eight hundred seventy-nine".