61621912 has 24 divisors (see below), whose sum is σ = 127001700. Its totient is φ = 28009520.

The previous prime is 61621907. The next prime is 61621919. The reversal of 61621912 is 21912616.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61621919) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 30862 + ... + 32797.

Almost surely, 2^61621912 is an apocalyptic number.

It is an amenable number.

61621912 is an abundant number, since it is smaller than the sum of its proper divisors (65379788).

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

61621912 is a wasteful number, since it uses less digits than its factorization.

61621912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63687 (or 63672 counting only the distinct ones).

The product of its digits is 1296, while the sum is 28.

The square root of 61621912 is about 7849.9625476814. The cubic root of 61621912 is about 394.9829870363.

The spelling of 61621912 in words is "sixty-one million, six hundred twenty-one thousand, nine hundred twelve".