61331604 has 24 divisors (see below), whose sum is σ = 143438400. Its totient is φ = 20396544.

The previous prime is 61331587. The next prime is 61331623. The reversal of 61331604 is 40613316.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 304 + ... + 11079.

It is an arithmetic number, because the mean of its divisors is an integer number (5976600).

Almost surely, 2^61331604 is an apocalyptic number.

It is an amenable number.

61331604 is an abundant number, since it is smaller than the sum of its proper divisors (82106796).

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

61331604 is a wasteful number, since it uses less digits than its factorization.

61331604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11839 (or 11837 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 61331604 is about 7831.4496742302. The cubic root of 61331604 is about 394.3617401482.

The spelling of 61331604 in words is "sixty-one million, three hundred thirty-one thousand, six hundred four".