57491457464 has 64 divisors (see below), whose sum is σ = 127950858240. Its totient is φ = 23697982080.

The previous prime is 57491457431. The next prime is 57491457503. The reversal of 57491457464 is 46475419475.

It is a super-2 number, since 2×57491457464² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (56).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 181382 + ... + 384554.

It is an arithmetic number, because the mean of its divisors is an integer number (1999232160).

Almost surely, 2^57491457464 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 57491457464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63975429120).

57491457464 is an abundant number, since it is smaller than the sum of its proper divisors (70459400776).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

57491457464 is a wasteful number, since it uses less digits than its factorization.

57491457464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203380 (or 203376 counting only the distinct ones).

The product of its digits is 16934400, while the sum is 56.

The spelling of 57491457464 in words is "fifty-seven billion, four hundred ninety-one million, four hundred fifty-seven thousand, four hundred sixty-four".