641177253 has 12 divisors (see below), whose sum is σ = 980624268. Its totient is φ = 402307200.

The previous prime is 641177239. The next prime is 641177263. The reversal of 641177253 is 352771146.

It is a happy number.

641177253 is a `hidden beast` number, since 641 + 1 + 7 + 7 + 2 + 5 + 3 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 477772164 + 163405089 = 21858^2 + 12783^2 .

It is not a de Polignac number, because 641177253 - 2⁴ = 641177237 is a prime.

It is a super-2 number, since 2×641177253² = 822216539529252018, which contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641177213) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2095198 + ... + 2095503.

It is an arithmetic number, because the mean of its divisors is an integer number (81718689).

Almost surely, 2^641177253 is an apocalyptic number.

It is an amenable number.

641177253 is a deficient number, since it is larger than the sum of its proper divisors (339447015).

641177253 is a wasteful number, since it uses less digits than its factorization.

641177253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4190724 (or 4190721 counting only the distinct ones).

The product of its digits is 35280, while the sum is 36.

The square root of 641177253 is about 25321.4780966673. The cubic root of 641177253 is about 862.3019512506.

The spelling of 641177253 in words is "six hundred forty-one million, one hundred seventy-seven thousand, two hundred fifty-three".