57661423209 has 32 divisors (see below), whose sum is σ = 92018424960. Its totient is φ = 35475084864.

The previous prime is 57661423201. The next prime is 57661423217. The reversal of 57661423209 is 90232416675.

57661423209 is a `hidden beast` number, since 5 + 7 + 6 + 614 + 2 + 3 + 20 + 9 = 666.

It is an interprime number because it is at equal distance from previous prime (57661423201) and next prime (57661423217).

It is not a de Polignac number, because 57661423209 - 2³ = 57661423201 is a prime.

It is not an unprimeable number, because it can be changed into a prime (57661423201) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1558762 + ... + 1595324.

It is an arithmetic number, because the mean of its divisors is an integer number (2875575780).

Almost surely, 2^57661423209 is an apocalyptic number.

It is an amenable number.

57661423209 is a deficient number, since it is larger than the sum of its proper divisors (34357001751).

57661423209 is a wasteful number, since it uses less digits than its factorization.

57661423209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41078 (or 41072 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 45.

The spelling of 57661423209 in words is "fifty-seven billion, six hundred sixty-one million, four hundred twenty-three thousand, two hundred nine".