641225676 has 96 divisors (see below), whose sum is σ = 1859673088. Its totient is φ = 167443200.

The previous prime is 641225659. The next prime is 641225677. The reversal of 641225676 is 676522146.

It is a super-2 number, since 2×641225676² = 822340735123313952, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (641225677) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 109626 + ... + 115326.

Almost surely, 2^641225676 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 641225676, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (929836544).

641225676 is an abundant number, since it is smaller than the sum of its proper divisors (1218447412).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

641225676 is a wasteful number, since it uses less digits than its factorization.

641225676 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5831 (or 5829 counting only the distinct ones).

The product of its digits is 120960, while the sum is 39.

The square root of 641225676 is about 25322.4342431765. The cubic root of 641225676 is about 862.3236582986.

The spelling of 641225676 in words is "six hundred forty-one million, two hundred twenty-five thousand, six hundred seventy-six".