61465820 has 24 divisors (see below), whose sum is σ = 139007904. Its totient is φ = 22694976.

The previous prime is 61465813. The next prime is 61465837. The reversal of 61465820 is 2856416.

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, 117944 + ... + 118463.

It is an arithmetic number, because the mean of its divisors is an integer number (5791996).

Almost surely, 2^61465820 is an apocalyptic number.

It is an amenable number.

61465820 is an abundant number, since it is smaller than the sum of its proper divisors (77542084).

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

61465820 is a wasteful number, since it uses less digits than its factorization.

61465820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236429 (or 236427 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 61465820 is about 7840.0140305997. The cubic root of 61465820 is about 394.6491998423.

The spelling of 61465820 in words is "sixty-one million, four hundred sixty-five thousand, eight hundred twenty".