999511396632 has 288 divisors, whose sum is σ = 3274612024320. Its totient is φ = 284786591040.

The previous prime is 999511396531. The next prime is 999511396657. The reversal of 999511396632 is 236693115999.

999511396632 is a `hidden beast` number, since 99 + 95 + 11 + 396 + 63 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a self number, because there is not a number n which added to its sum of digits gives 999511396632.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 34944657 + ... + 34973247.

It is an arithmetic number, because the mean of its divisors is an integer number (11370180640).

Almost surely, 2^999511396632 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 999511396632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1637306012160).

999511396632 is an abundant number, since it is smaller than the sum of its proper divisors (2275100627688).

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

999511396632 is a wasteful number, since it uses less digits than its factorization.

999511396632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28993 (or 28970 counting only the distinct ones).

The product of its digits is 21257640, while the sum is 63.

The spelling of 999511396632 in words is "nine hundred ninety-nine billion, five hundred eleven million, three hundred ninety-six thousand, six hundred thirty-two".