61911872 has 28 divisors (see below), whose sum is σ = 134026656. Its totient is φ = 28141440.

The previous prime is 61911869. The next prime is 61911877. The reversal of 61911872 is 27811916.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61911877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43268 + ... + 44675.

Almost surely, 2^61911872 is an apocalyptic number.

It is an amenable number.

61911872 is an abundant number, since it is smaller than the sum of its proper divisors (72114784).

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

61911872 is a wasteful number, since it uses less digits than its factorization.

61911872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87966 (or 87956 counting only the distinct ones).

The product of its digits is 6048, while the sum is 35.

The square root of 61911872 is about 7868.4097503879. The cubic root of 61911872 is about 395.6015445881.

The spelling of 61911872 in words is "sixty-one million, nine hundred eleven thousand, eight hundred seventy-two".