61914591 has 16 divisors (see below), whose sum is σ = 92889600. Its totient is φ = 40752504.

The previous prime is 61914583. The next prime is 61914613. The reversal of 61914591 is 19541916.

61914591 is a `hidden beast` number, since 61 + 9 + 1 + 4 + 591 = 666.

It is not a de Polignac number, because 61914591 - 2³ = 61914583 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61914511) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12381 + ... + 16646.

It is an arithmetic number, because the mean of its divisors is an integer number (5805600).

Almost surely, 2^61914591 is an apocalyptic number.

61914591 is a deficient number, since it is larger than the sum of its proper divisors (30975009).

61914591 is a wasteful number, since it uses less digits than its factorization.

61914591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29115 (or 29109 counting only the distinct ones).

The product of its digits is 9720, while the sum is 36.

The square root of 61914591 is about 7868.5825280034. The cubic root of 61914591 is about 395.6073357491.

The spelling of 61914591 in words is "sixty-one million, nine hundred fourteen thousand, five hundred ninety-one".