57478452999781 has 16 divisors (see below), whose sum is σ = 62841202444800. Its totient is φ = 52138620762480.

The previous prime is 57478452999719. The next prime is 57478452999817. The reversal of 57478452999781 is 18799925487475.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57478452999781 is a prime.

It is a super-2 number, since 2×57478452999781² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57478452999581) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 105545470 + ... + 106088656.

It is an arithmetic number, because the mean of its divisors is an integer number (3927575152800).

Almost surely, 2^{57478452999781} is an apocalyptic number.

It is an amenable number.

57478452999781 is a deficient number, since it is larger than the sum of its proper divisors (5362749445019).

57478452999781 is a wasteful number, since it uses less digits than its factorization.

57478452999781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 564264.

The product of its digits is 12802406400, while the sum is 85.

The spelling of 57478452999781 in words is "fifty-seven trillion, four hundred seventy-eight billion, four hundred fifty-two million, nine hundred ninety-nine thousand, seven hundred eighty-one".