641942316 has 18 divisors (see below), whose sum is σ = 1622687612. Its totient is φ = 213980760.

The previous prime is 641942299. The next prime is 641942317. The reversal of 641942316 is 613249146.

641942316 is a `hidden beast` number, since 6 + 419 + 4 + 231 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 17831731 = 641942316 / (6 + 4 + 1 + 9 + 4 + 2 + 3 + 1 + 6).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (641942317) 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, 8915830 + ... + 8915901.

Almost surely, 2^641942316 is an apocalyptic number.

It is an amenable number.

641942316 is an abundant number, since it is smaller than the sum of its proper divisors (980745296).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

641942316 is a wasteful number, since it uses less digits than its factorization.

641942316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17831741 (or 17831736 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The square root of 641942316 is about 25336.5805901270. The cubic root of 641942316 is about 862.6447857757.

The spelling of 641942316 in words is "six hundred forty-one million, nine hundred forty-two thousand, three hundred sixteen".