6397523442 has 12 divisors (see below), whose sum is σ = 13861300830. Its totient is φ = 2132507808.

The previous prime is 6397523357. The next prime is 6397523477. The reversal of 6397523442 is 2443257936.

6397523442 is a `hidden beast` number, since 639 + 7 + 5 + 2 + 3 + 4 + 4 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 5966172081 + 431351361 = 77241^2 + 20769^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 177708967 + ... + 177709002.

Almost surely, 2^6397523442 is an apocalyptic number.

6397523442 is an abundant number, since it is smaller than the sum of its proper divisors (7463777388).

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

6397523442 is a wasteful number, since it uses less digits than its factorization.

6397523442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 355417977 (or 355417974 counting only the distinct ones).

The product of its digits is 1088640, while the sum is 45.

The square root of 6397523442 is about 79984.5200148129. The cubic root of 6397523442 is about 1856.3960199658.

The spelling of 6397523442 in words is "six billion, three hundred ninety-seven million, five hundred twenty-three thousand, four hundred forty-two".