999647803632 has 80 divisors (see below), whose sum is σ = 2738878414848. Its totient is φ = 313503210240.

The previous prime is 999647803631. The next prime is 999647803727. The reversal of 999647803632 is 236308746999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999647803631) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7354608 + ... + 7489295.

Almost surely, 2^999647803632 is an apocalyptic number.

999647803632 is a gapful number since it is divisible by the number (92) formed by its first and last digit.

It is an amenable number.

999647803632 is an abundant number, since it is smaller than the sum of its proper divisors (1739230611216).

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

999647803632 is a wasteful number, since it uses less digits than its factorization.

999647803632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14843998 (or 14843992 counting only the distinct ones).

The product of its (nonzero) digits is 105815808, while the sum is 66.

The spelling of 999647803632 in words is "nine hundred ninety-nine billion, six hundred forty-seven million, eight hundred three thousand, six hundred thirty-two".