641614557 has 16 divisors (see below), whose sum is σ = 870912000. Its totient is φ = 420045744.

The previous prime is 641614543. The next prime is 641614559. The reversal of 641614557 is 755416146.

It is not a de Polignac number, because 641614557 - 2¹⁵ = 641581789 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641614559) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 285444 + ... + 287682.

It is an arithmetic number, because the mean of its divisors is an integer number (54432000).

Almost surely, 2^641614557 is an apocalyptic number.

It is an amenable number.

641614557 is a deficient number, since it is larger than the sum of its proper divisors (229297443).

641614557 is a wasteful number, since it uses less digits than its factorization.

641614557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3920.

The product of its digits is 100800, while the sum is 39.

The square root of 641614557 is about 25330.1116657625. Note that the first 3 decimals coincide. The cubic root of 641614557 is about 862.4979461409.

The spelling of 641614557 in words is "six hundred forty-one million, six hundred fourteen thousand, five hundred fifty-seven".