6421607654 has 48 divisors (see below), whose sum is σ = 12409417728. Its totient is φ = 2421162000.

The previous prime is 6421607629. The next prime is 6421607671. The reversal of 6421607654 is 4567061246.

It is a happy number.

It is a super-2 number, since 2×6421607654² = 82474089723822767432, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 126299 + ... + 169689.

It is an arithmetic number, because the mean of its divisors is an integer number (258529536).

Almost surely, 2^6421607654 is an apocalyptic number.

6421607654 is a deficient number, since it is larger than the sum of its proper divisors (5987810074).

6421607654 is a wasteful number, since it uses less digits than its factorization.

6421607654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43473 (or 43442 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 41.

The square root of 6421607654 is about 80134.9340425260. The cubic root of 6421607654 is about 1858.7226414910.

The spelling of 6421607654 in words is "six billion, four hundred twenty-one million, six hundred seven thousand, six hundred fifty-four".