61657494 has 8 divisors (see below), whose sum is σ = 123315000. Its totient is φ = 20552496.

The previous prime is 61657483. The next prime is 61657499. The reversal of 61657494 is 49475616.

It is a sphenic number, since it is the product of 3 distinct primes.

61657494 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61657499) 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, 5138119 + ... + 5138130.

It is an arithmetic number, because the mean of its divisors is an integer number (15414375).

Almost surely, 2^61657494 is an apocalyptic number.

61657494 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

61657494 is a wasteful number, since it uses less digits than its factorization.

61657494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10276254.

The product of its digits is 181440, while the sum is 42.

The square root of 61657494 is about 7852.2286008496. The cubic root of 61657494 is about 395.0589966891.

The spelling of 61657494 in words is "sixty-one million, six hundred fifty-seven thousand, four hundred ninety-four".