408642077457 has 6 divisors (see below), whose sum is σ = 590260778562. Its totient is φ = 272428051632.

The previous prime is 408642077453. The next prime is 408642077477. The reversal of 408642077457 is 754770246804.

408642077457 is a `hidden beast` number, since 4 + 0 + 86 + 42 + 0 + 77 + 457 = 666.

It can be written as a sum of positive squares in only one way, i.e., 353930996241 + 54711081216 = 594921^2 + 233904^2 .

It is not a de Polignac number, because 408642077457 - 2² = 408642077453 is a prime.

It is not an unprimeable number, because it can be changed into a prime (408642077453) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22702337628 + ... + 22702337645.

It is an arithmetic number, because the mean of its divisors is an integer number (98376796427).

Almost surely, 2^408642077457 is an apocalyptic number.

It is an amenable number.

408642077457 is a deficient number, since it is larger than the sum of its proper divisors (181618701105).

408642077457 is a wasteful number, since it uses less digits than its factorization.

408642077457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45404675279 (or 45404675276 counting only the distinct ones).

The product of its (nonzero) digits is 10536960, while the sum is 54.

The spelling of 408642077457 in words is "four hundred eight billion, six hundred forty-two million, seventy-seven thousand, four hundred fifty-seven".