640174551457 has 8 divisors (see below), whose sum is σ = 756856612800. Its totient is φ = 529799628624.

The previous prime is 640174551451. The next prime is 640174551479. The reversal of 640174551457 is 754155471046.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 640174551457 - 2²⁷ = 640040333729 is a prime.

It is a super-2 number, since 2×640174551457² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 640174551457.

It is not an unprimeable number, because it can be changed into a prime (640174551451) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1576784407 + ... + 1576784812.

It is an arithmetic number, because the mean of its divisors is an integer number (94607076600).

Almost surely, 2^640174551457 is an apocalyptic number.

It is an amenable number.

640174551457 is a deficient number, since it is larger than the sum of its proper divisors (116682061343).

640174551457 is a wasteful number, since it uses less digits than its factorization.

640174551457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3153569255.

The product of its (nonzero) digits is 2352000, while the sum is 49.

The spelling of 640174551457 in words is "six hundred forty billion, one hundred seventy-four million, five hundred fifty-one thousand, four hundred fifty-seven".