61461855164 has 12 divisors (see below), whose sum is σ = 111267151800. Its totient is φ = 29671240368.

The previous prime is 61461855163. The next prime is 61461855173. The reversal of 61461855164 is 46155816416.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61461855163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 264921674 + ... + 264921905.

It is an arithmetic number, because the mean of its divisors is an integer number (9272262650).

Almost surely, 2^61461855164 is an apocalyptic number.

It is an amenable number.

61461855164 is a deficient number, since it is larger than the sum of its proper divisors (49805296636).

61461855164 is a wasteful number, since it uses less digits than its factorization.

61461855164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 529843612 (or 529843610 counting only the distinct ones).

The product of its digits is 691200, while the sum is 47.

The spelling of 61461855164 in words is "sixty-one billion, four hundred sixty-one million, eight hundred fifty-five thousand, one hundred sixty-four".