61589815 has 12 divisors (see below), whose sum is σ = 85974696. Its totient is φ = 42232848.

The previous prime is 61589813. The next prime is 61589819. The reversal of 61589815 is 51898516.

It is not a de Polignac number, because 61589815 - 2¹ = 61589813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61589813) 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, 125449 + ... + 125938.

It is an arithmetic number, because the mean of its divisors is an integer number (7164558).

Almost surely, 2^61589815 is an apocalyptic number.

61589815 is a deficient number, since it is larger than the sum of its proper divisors (24384881).

61589815 is a wasteful number, since it uses less digits than its factorization.

61589815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251406 (or 251399 counting only the distinct ones).

The product of its digits is 86400, while the sum is 43.

The square root of 61589815 is about 7847.9178767365. The cubic root of 61589815 is about 394.9143968746.

The spelling of 61589815 in words is "sixty-one million, five hundred eighty-nine thousand, eight hundred fifteen".