6361431644 has 12 divisors (see below), whose sum is σ = 11200804104. Its totient is φ = 3161201904.

The previous prime is 6361431617. The next prime is 6361431649. The reversal of 6361431644 is 4461341636.

It is a happy number.

It is a super-2 number, since 2×6361431644² = 80935625122569085472, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6361431598 and 6361431607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6361431649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4877747 + ... + 4879050.

It is an arithmetic number, because the mean of its divisors is an integer number (933400342).

Almost surely, 2^6361431644 is an apocalyptic number.

It is an amenable number.

6361431644 is a deficient number, since it is larger than the sum of its proper divisors (4839372460).

6361431644 is a wasteful number, since it uses less digits than its factorization.

6361431644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9756964 (or 9756962 counting only the distinct ones).

The product of its digits is 124416, while the sum is 38.

The square root of 6361431644 is about 79758.5835129988. The cubic root of 6361431644 is about 1852.8984654040.

The spelling of 6361431644 in words is "six billion, three hundred sixty-one million, four hundred thirty-one thousand, six hundred forty-four".