641642512 has 40 divisors (see below), whose sum is σ = 1421980416. Its totient is φ = 274757376.

The previous prime is 641642501. The next prime is 641642621. The reversal of 641642512 is 215246146.

It is a happy number.

It is a super-2 number, since 2×641642512² = 823410226411340288, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 229668 + ... + 232444.

Almost surely, 2^641642512 is an apocalyptic number.

It is an amenable number.

641642512 is an abundant number, since it is smaller than the sum of its proper divisors (780337904).

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

641642512 is a wasteful number, since it uses less digits than its factorization.

641642512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4855 (or 4849 counting only the distinct ones).

The product of its digits is 11520, while the sum is 31.

The square root of 641642512 is about 25330.6634733479. The cubic root of 641642512 is about 862.5104722386.

Adding to 641642512 its reverse (215246146), we get a palindrome (856888658).

The spelling of 641642512 in words is "six hundred forty-one million, six hundred forty-two thousand, five hundred twelve".