999772107840 has 168 divisors, whose sum is σ = 3751417732608. Its totient is φ = 242368988160.

The previous prime is 999772107833. The next prime is 999772107863. The reversal of 999772107840 is 48701277999.

It is a super-2 number, since 2×999772107840² (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 23 ways as a sum of consecutive naturals, for example, 15747552 + ... + 15810911.

It is an arithmetic number, because the mean of its divisors is an integer number (22329867456).

Almost surely, 2^999772107840 is an apocalyptic number.

999772107840 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

999772107840 is an abundant number, since it is smaller than the sum of its proper divisors (2751645624768).

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

999772107840 is a wasteful number, since it uses less digits than its factorization.

999772107840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31558497 (or 31558484 counting only the distinct ones).

The product of its (nonzero) digits is 16003008, while the sum is 63.

The spelling of 999772107840 in words is "nine hundred ninety-nine billion, seven hundred seventy-two million, one hundred seven thousand, eight hundred forty".