61657450 has 24 divisors (see below), whose sum is σ = 118385280. Its totient is φ = 23866800.

The previous prime is 61657423. The next prime is 61657483. The reversal of 61657450 is 5475616.

It is a happy number.

It is a super-2 number, since 2×61657450² = 7603282281005000, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18340 + ... + 21439.

It is an arithmetic number, because the mean of its divisors is an integer number (4932720).

Almost surely, 2^61657450 is an apocalyptic number.

61657450 is a deficient number, since it is larger than the sum of its proper divisors (56727830).

61657450 is a wasteful number, since it uses less digits than its factorization.

61657450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39822 (or 39817 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 34.

The square root of 61657450 is about 7852.2257990967. The cubic root of 61657450 is about 395.0589027152.

The spelling of 61657450 in words is "sixty-one million, six hundred fifty-seven thousand, four hundred fifty".