61638374 has 48 divisors (see below), whose sum is σ = 112285440. Its totient is φ = 25280640.

The previous prime is 61638371. The next prime is 61638383. The reversal of 61638374 is 47383616.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61638371) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 322619 + ... + 322809.

It is an arithmetic number, because the mean of its divisors is an integer number (2339280).

Almost surely, 2^61638374 is an apocalyptic number.

61638374 is a deficient number, since it is larger than the sum of its proper divisors (50647066).

61638374 is a wasteful number, since it uses less digits than its factorization.

61638374 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333 (or 326 counting only the distinct ones).

The product of its digits is 72576, while the sum is 38.

The square root of 61638374 is about 7851.0110176970. The cubic root of 61638374 is about 395.0181565120.

The spelling of 61638374 in words is "sixty-one million, six hundred thirty-eight thousand, three hundred seventy-four".