641145490 has 16 divisors (see below), whose sum is σ = 1154706840. Its totient is φ = 256314880.

The previous prime is 641145487. The next prime is 641145499. The reversal of 641145490 is 94541146.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 506655081 + 134490409 = 22509^2 + 11597^2 .

It is a super-2 number, since 2×641145490² = 822135078694680200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (641145499) 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, 1920 + ... + 35860.

Almost surely, 2^641145490 is an apocalyptic number.

641145490 is a deficient number, since it is larger than the sum of its proper divisors (513561350).

641145490 is a wasteful number, since it uses less digits than its factorization.

641145490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35837.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 641145490 is about 25320.8508940754. The cubic root of 641145490 is about 862.2877119488.

The spelling of 641145490 in words is "six hundred forty-one million, one hundred forty-five thousand, four hundred ninety".