641650870 has 16 divisors (see below), whose sum is σ = 1319967648. Its totient is φ = 219994560.

The previous prime is 641650837. The next prime is 641650883. The reversal of 641650870 is 78056146.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4583151 + ... + 4583290.

It is an arithmetic number, because the mean of its divisors is an integer number (82497978).

Almost surely, 2^641650870 is an apocalyptic number.

641650870 is an abundant number, since it is smaller than the sum of its proper divisors (678316778).

641650870 is a wasteful number, since it uses less digits than its factorization.

641650870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9166455.

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 641650870 is about 25330.8284507238. The cubic root of 641650870 is about 862.5142172270.

It can be divided in two parts, 641 and 650870, that added together give a triangular number (651511 = T₁₁₄₁).

The spelling of 641650870 in words is "six hundred forty-one million, six hundred fifty thousand, eight hundred seventy".