6451519356 has 72 divisors (see below), whose sum is σ = 16772268240. Its totient is φ = 2089449216.

The previous prime is 6451519237. The next prime is 6451519357. The reversal of 6451519356 is 6539151546.

6451519356 is a `hidden beast` number, since 6 + 451 + 5 + 193 + 5 + 6 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6451519357) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1074595 + ... + 1080581.

It is an arithmetic number, because the mean of its divisors is an integer number (232948170).

Almost surely, 2^6451519356 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6451519356, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8386134120).

6451519356 is an abundant number, since it is smaller than the sum of its proper divisors (10320748884).

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

6451519356 is a wasteful number, since it uses less digits than its factorization.

6451519356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6843 (or 6838 counting only the distinct ones).

The product of its digits is 486000, while the sum is 45.

The square root of 6451519356 is about 80321.3505613545. The cubic root of 6451519356 is about 1861.6041346926.

The spelling of 6451519356 in words is "six billion, four hundred fifty-one million, five hundred nineteen thousand, three hundred fifty-six".