61005864 has 16 divisors (see below), whose sum is σ = 152514720. Its totient is φ = 20335280.

The previous prime is 61005839. The next prime is 61005907. The reversal of 61005864 is 46850016.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1270932 + ... + 1270979.

It is an arithmetic number, because the mean of its divisors is an integer number (9532170).

Almost surely, 2^61005864 is an apocalyptic number.

It is an amenable number.

61005864 is an abundant number, since it is smaller than the sum of its proper divisors (91508856).

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

61005864 is a wasteful number, since it uses less digits than its factorization.

61005864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2541920 (or 2541916 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 61005864 is about 7810.6250710170. The cubic root of 61005864 is about 393.6623319058.

The spelling of 61005864 in words is "sixty-one million, five thousand, eight hundred sixty-four".