6401299056 has 20 divisors (see below), whose sum is σ = 16536689352. Its totient is φ = 2133766336.

The previous prime is 6401299043. The next prime is 6401299067. The reversal of 6401299056 is 6509921046.

It is a happy number.

It is a super-2 number, since 2×6401299056² = 81953259208692982272, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6401298999 and 6401299017.

It is a congruent number.

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, 66680151 + ... + 66680246.

Almost surely, 2^6401299056 is an apocalyptic number.

It is an amenable number.

6401299056 is an abundant number, since it is smaller than the sum of its proper divisors (10135390296).

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

6401299056 is a wasteful number, since it uses less digits than its factorization.

6401299056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133360408 (or 133360402 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 42.

The square root of 6401299056 is about 80008.1186880432. The cubic root of 6401299056 is about 1856.7611433598.

The spelling of 6401299056 in words is "six billion, four hundred one million, two hundred ninety-nine thousand, fifty-six".