641432860276 has 24 divisors (see below), whose sum is σ = 1208876811464. Its totient is φ = 296040407040.

The previous prime is 641432860273. The next prime is 641432860283. The reversal of 641432860276 is 672068234146.

It can be written as a sum of positive squares in 4 ways, for example, as 4670355600 + 636762504676 = 68340^2 + 797974^2 .

It is a super-2 number, since 2×641432860276² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641432860273) 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, 4330156 + ... + 4475836.

Almost surely, 2^641432860276 is an apocalyptic number.

It is an amenable number.

641432860276 is a deficient number, since it is larger than the sum of its proper divisors (567443951188).

641432860276 is a wasteful number, since it uses less digits than its factorization.

641432860276 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230371 (or 230369 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 49.

The spelling of 641432860276 in words is "six hundred forty-one billion, four hundred thirty-two million, eight hundred sixty thousand, two hundred seventy-six".