61901904 has 20 divisors (see below), whose sum is σ = 159913376. Its totient is φ = 20633952.

The previous prime is 61901899. The next prime is 61901909. The reversal of 61901904 is 40910916.

It is an interprime number because it is at equal distance from previous prime (61901899) and next prime (61901909).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61901909) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 644764 + ... + 644859.

Almost surely, 2^61901904 is an apocalyptic number.

It is an amenable number.

61901904 is an abundant number, since it is smaller than the sum of its proper divisors (98011472).

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

61901904 is a wasteful number, since it uses less digits than its factorization.

61901904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1289634 (or 1289628 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 30.

The square root of 61901904 is about 7867.7763059202. The cubic root of 61901904 is about 395.5803124307.

The spelling of 61901904 in words is "sixty-one million, nine hundred one thousand, nine hundred four".