6391980972 has 96 divisors (see below), whose sum is σ = 17945869760. Its totient is φ = 1955819520.

The previous prime is 6391980937. The next prime is 6391980997. The reversal of 6391980972 is 2790891936.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 241548 + ... + 266700.

Almost surely, 2^6391980972 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 6391980972, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8972934880).

6391980972 is an abundant number, since it is smaller than the sum of its proper divisors (11553888788).

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

6391980972 is a wasteful number, since it uses less digits than its factorization.

6391980972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25360 (or 25352 counting only the distinct ones).

The product of its (nonzero) digits is 1469664, while the sum is 54.

The square root of 6391980972 is about 79949.8653657403. The cubic root of 6391980972 is about 1855.8597712097.

The spelling of 6391980972 in words is "six billion, three hundred ninety-one million, nine hundred eighty thousand, nine hundred seventy-two".