899640686752 has 24 divisors (see below), whose sum is σ = 1795430176596. Its totient is φ = 443658419712.

The previous prime is 899640686669. The next prime is 899640686761. The reversal of 899640686752 is 257686046998.

It can be written as a sum of positive squares in 2 ways, for example, as 890841496336 + 8799190416 = 943844^2 + 93804^2 .

It is a super-2 number, since 2×899640686752² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 192557743 + ... + 192562414.

Almost surely, 2^899640686752 is an apocalyptic number.

It is an amenable number.

899640686752 is a deficient number, since it is larger than the sum of its proper divisors (895789489844).

899640686752 is a wasteful number, since it uses less digits than its factorization.

899640686752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 385120240 (or 385120232 counting only the distinct ones).

The product of its (nonzero) digits is 313528320, while the sum is 70.

The spelling of 899640686752 in words is "eight hundred ninety-nine billion, six hundred forty million, six hundred eighty-six thousand, seven hundred fifty-two".