641557405463 has 8 divisors (see below), whose sum is σ = 691469249856. Its totient is φ = 591725743200.

The previous prime is 641557405441. The next prime is 641557405507. The reversal of 641557405463 is 364504755146.

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

It is a cyclic number.

It is not a de Polignac number, because 641557405463 - 2⁶ = 641557405399 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641557404463) 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, 20028908 + ... + 20060913.

It is an arithmetic number, because the mean of its divisors is an integer number (86433656232).

Almost surely, 2^641557405463 is an apocalyptic number.

641557405463 is a deficient number, since it is larger than the sum of its proper divisors (49911844393).

641557405463 is a wasteful number, since it uses less digits than its factorization.

641557405463 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40091065.

The product of its (nonzero) digits is 6048000, while the sum is 50.

The spelling of 641557405463 in words is "six hundred forty-one billion, five hundred fifty-seven million, four hundred five thousand, four hundred sixty-three".