5457781664 has 24 divisors (see below), whose sum is σ = 10748585988. Its totient is φ = 2727982080.

The previous prime is 5457781639. The next prime is 5457781687. The reversal of 5457781664 is 4661877545.

It can be written as a sum of positive squares in 2 ways, for example, as 5431690000 + 26091664 = 73700^2 + 5108^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74984 + ... + 128600.

Almost surely, 2^5457781664 is an apocalyptic number.

It is an amenable number.

5457781664 is a deficient number, since it is larger than the sum of its proper divisors (5290804324).

5457781664 is a wasteful number, since it uses less digits than its factorization.

5457781664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56808 (or 56800 counting only the distinct ones).

The product of its digits is 5644800, while the sum is 53.

The square root of 5457781664 is about 73876.8005804258. The cubic root of 5457781664 is about 1760.6460334962.

The spelling of 5457781664 in words is "five billion, four hundred fifty-seven million, seven hundred eighty-one thousand, six hundred sixty-four".