61654257 has 64 divisors (see below), whose sum is σ = 114278400. Its totient is φ = 32037120.

The previous prime is 61654253. The next prime is 61654273. The reversal of 61654257 is 75245616.

It is a happy number.

61654257 is a `hidden beast` number, since 61 + 6 + 542 + 57 = 666.

It is not a de Polignac number, because 61654257 - 2² = 61654253 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61654253) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 99294 + ... + 99912.

It is an arithmetic number, because the mean of its divisors is an integer number (1785600).

Almost surely, 2^61654257 is an apocalyptic number.

It is an amenable number.

61654257 is a deficient number, since it is larger than the sum of its proper divisors (52624143).

61654257 is a wasteful number, since it uses less digits than its factorization.

61654257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 683 (or 677 counting only the distinct ones).

The product of its digits is 50400, while the sum is 36.

The square root of 61654257 is about 7852.0224783173. The cubic root of 61654257 is about 395.0520830751.

The spelling of 61654257 in words is "sixty-one million, six hundred fifty-four thousand, two hundred fifty-seven".