61040457 has 12 divisors (see below), whose sum is σ = 91014144. Its totient is φ = 39380760.

The previous prime is 61040437. The next prime is 61040467. The reversal of 61040457 is 75404016.

61040457 is a `hidden beast` number, since 610 + 4 + 0 + 45 + 7 = 666.

It is not a de Polignac number, because 61040457 - 2⁸ = 61040201 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61040457.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61040437) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 109113 + ... + 109670.

It is an arithmetic number, because the mean of its divisors is an integer number (7584512).

Almost surely, 2^61040457 is an apocalyptic number.

It is an amenable number.

61040457 is a deficient number, since it is larger than the sum of its proper divisors (29973687).

61040457 is a wasteful number, since it uses less digits than its factorization.

61040457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218820 (or 218817 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 61040457 is about 7812.8392406346. The cubic root of 61040457 is about 393.7367257808.

The spelling of 61040457 in words is "sixty-one million, forty thousand, four hundred fifty-seven".