999999687952 has 40 divisors (see below), whose sum is σ = 2054573902872. Its totient is φ = 469876070400.

The previous prime is 999999687949. The next prime is 999999687983. The reversal of 999999687952 is 259786999999.

It can be written as a sum of positive squares in 4 ways, for example, as 301163878656 + 698835809296 = 548784^2 + 835964^2 .

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, 2601199 + ... + 2960782.

Almost surely, 2^999999687952 is an apocalyptic number.

It is an amenable number.

999999687952 is an abundant number, since it is smaller than the sum of its proper divisors (1054574214920).

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

999999687952 is a wasteful number, since it uses less digits than its factorization.

999999687952 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5562667 (or 5562661 counting only the distinct ones).

The product of its digits is 16070775840, while the sum is 91.

The spelling of 999999687952 in words is "nine hundred ninety-nine billion, nine hundred ninety-nine million, six hundred eighty-seven thousand, nine hundred fifty-two".