646702726252 has 24 divisors (see below), whose sum is σ = 1238976914112. Its totient is φ = 292917066000.

The previous prime is 646702726237. The next prime is 646702726273. The reversal of 646702726252 is 252627207646.

It is a happy number.

It is a super-2 number, since 2×646702726252² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 646702726196 and 646702726205.

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, 25955374 + ... + 25980277.

It is an arithmetic number, because the mean of its divisors is an integer number (51624038088).

Almost surely, 2^646702726252 is an apocalyptic number.

It is an amenable number.

646702726252 is a deficient number, since it is larger than the sum of its proper divisors (592274187860).

646702726252 is a wasteful number, since it uses less digits than its factorization.

646702726252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51935949 (or 51935947 counting only the distinct ones).

The product of its (nonzero) digits is 3386880, while the sum is 49.

The spelling of 646702726252 in words is "six hundred forty-six billion, seven hundred two million, seven hundred twenty-six thousand, two hundred fifty-two".