807943446440 has 32 divisors (see below), whose sum is σ = 1957709121480. Its totient is φ = 298317580032.

The previous prime is 807943446379. The next prime is 807943446461. The reversal of 807943446440 is 44644349708.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 381792995236 + 426150451204 = 617894^2 + 652802^2 .

It is a super-2 number, since 2×807943446440² (a number of 25 digits) contains 22 as substring.

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, 776868179 + ... + 776869218.

Almost surely, 2^807943446440 is an apocalyptic number.

It is an amenable number.

807943446440 is an abundant number, since it is smaller than the sum of its proper divisors (1149765675040).

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

807943446440 is a wasteful number, since it uses less digits than its factorization.

807943446440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1553737421 (or 1553737417 counting only the distinct ones).

The product of its (nonzero) digits is 9289728, while the sum is 53.

The spelling of 807943446440 in words is "eight hundred seven billion, nine hundred forty-three million, four hundred forty-six thousand, four hundred forty".