6469891544 has 16 divisors (see below), whose sum is σ = 12131962920. Its totient is φ = 3234701440.

The previous prime is 6469891511. The next prime is 6469891573. The reversal of 6469891544 is 4451989646.

It is a super-2 number, since 2×6469891544² = 83718993182245407872, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 6469891544.

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, 134384 + ... + 176064.

Almost surely, 2^6469891544 is an apocalyptic number.

It is an amenable number.

6469891544 is a deficient number, since it is larger than the sum of its proper divisors (5662071376).

6469891544 is a wasteful number, since it uses less digits than its factorization.

6469891544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61090 (or 61086 counting only the distinct ones).

The product of its digits is 7464960, while the sum is 56.

The square root of 6469891544 is about 80435.6360327933. The cubic root of 6469891544 is about 1863.3695755004.

The spelling of 6469891544 in words is "six billion, four hundred sixty-nine million, eight hundred ninety-one thousand, five hundred forty-four".