61520164 has 12 divisors (see below), whose sum is σ = 107743104. Its totient is φ = 30736424.

The previous prime is 61520153. The next prime is 61520177. The reversal of 61520164 is 46102516.

61520164 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 777 + ... + 11119.

It is an arithmetic number, because the mean of its divisors is an integer number (8978592).

Almost surely, 2^61520164 is an apocalyptic number.

It is an amenable number.

61520164 is a deficient number, since it is larger than the sum of its proper divisors (46222940).

61520164 is a wasteful number, since it uses less digits than its factorization.

61520164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11834 (or 11832 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 61520164 is about 7843.4790750024. The cubic root of 61520164 is about 394.7654731283.

The spelling of 61520164 in words is "sixty-one million, five hundred twenty thousand, one hundred sixty-four".