641342624 has 24 divisors (see below), whose sum is σ = 1359770580. Its totient is φ = 296004096.

The previous prime is 641342617. The next prime is 641342641. The reversal of 641342624 is 426243146.

It can be written as a sum of positive squares in 2 ways, for example, as 531763600 + 109579024 = 23060^2 + 10468^2 .

It is a super-2 number, since 2×641342624² = 822640722718410752, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 770429 + ... + 771260.

Almost surely, 2^641342624 is an apocalyptic number.

It is an amenable number.

641342624 is an abundant number, since it is smaller than the sum of its proper divisors (718427956).

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

641342624 is a wasteful number, since it uses less digits than its factorization.

641342624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1541712 (or 1541704 counting only the distinct ones).

The product of its digits is 27648, while the sum is 32.

The square root of 641342624 is about 25324.7433155797. The cubic root of 641342624 is about 862.3760792068.

The spelling of 641342624 in words is "six hundred forty-one million, three hundred forty-two thousand, six hundred twenty-four".