646386262760 has 64 divisors (see below), whose sum is σ = 1671421910400. Its totient is φ = 220380039936.

The previous prime is 646386262703. The next prime is 646386262813. The reversal of 646386262760 is 67262683646.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (56).

It is a junction number, because it is equal to n+sod(n) for n = 646386262696 and 646386262705.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6398267 + ... + 6498506.

It is an arithmetic number, because the mean of its divisors is an integer number (26115967350).

Almost surely, 2^646386262760 is an apocalyptic number.

It is an amenable number.

646386262760 is an abundant number, since it is smaller than the sum of its proper divisors (1025035647640).

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

646386262760 is a wasteful number, since it uses less digits than its factorization.

646386262760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12896970 (or 12896966 counting only the distinct ones).

The product of its (nonzero) digits is 20901888, while the sum is 56.

The spelling of 646386262760 in words is "six hundred forty-six billion, three hundred eighty-six million, two hundred sixty-two thousand, seven hundred sixty".