641607955 has 8 divisors (see below), whose sum is σ = 777867552. Its totient is φ = 507994368.

The previous prime is 641607913. The next prime is 641607959. The reversal of 641607955 is 559706146.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-641607955 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (641607959) 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, 660967 + ... + 661936.

It is an arithmetic number, because the mean of its divisors is an integer number (97233444).

Almost surely, 2^641607955 is an apocalyptic number.

641607955 is a deficient number, since it is larger than the sum of its proper divisors (136259597).

641607955 is a wasteful number, since it uses less digits than its factorization.

641607955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1323005.

The product of its (nonzero) digits is 226800, while the sum is 43.

The square root of 641607955 is about 25329.9813462229. The cubic root of 641607955 is about 862.4949878586.

The spelling of 641607955 in words is "six hundred forty-one million, six hundred seven thousand, nine hundred fifty-five".