646425796 has 6 divisors (see below), whose sum is σ = 1131245150. Its totient is φ = 323212896.

The previous prime is 646425761. The next prime is 646425797. The reversal of 646425796 is 697524646.

It can be written as a sum of positive squares in only one way, i.e., 431392900 + 215032896 = 20770^2 + 14664^2 .

It is not an unprimeable number, because it can be changed into a prime (646425797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80803221 + ... + 80803228.

Almost surely, 2^646425796 is an apocalyptic number.

It is an amenable number.

646425796 is a deficient number, since it is larger than the sum of its proper divisors (484819354).

646425796 is a wasteful number, since it uses less digits than its factorization.

646425796 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161606453 (or 161606451 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 49.

The square root of 646425796 is about 25424.9050342376. The cubic root of 646425796 is about 864.6484347651.

The spelling of 646425796 in words is "six hundred forty-six million, four hundred twenty-five thousand, seven hundred ninety-six".