646697896 has 32 divisors (see below), whose sum is σ = 1310538600. Its totient is φ = 297400320.

The previous prime is 646697881. The next prime is 646698067. The reversal of 646697896 is 698796646.

646697896 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 619512100 + 27185796 = 24890^2 + 5214^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18160 + ... + 40288.

Almost surely, 2^646697896 is an apocalyptic number.

It is an amenable number.

646697896 is an abundant number, since it is smaller than the sum of its proper divisors (663840704).

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

646697896 is a wasteful number, since it uses less digits than its factorization.

646697896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22429 (or 22425 counting only the distinct ones).

The product of its digits is 23514624, while the sum is 61.

The square root of 646697896 is about 25430.2555236867. The cubic root of 646697896 is about 864.7697365641.

The spelling of 646697896 in words is "six hundred forty-six million, six hundred ninety-seven thousand, eight hundred ninety-six".