996781077936 has 120 divisors (see below), whose sum is σ = 3188553267744. Its totient is φ = 284755645440.

The previous prime is 996781077917. The next prime is 996781077983. The reversal of 996781077936 is 639770187699.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (72).

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, 7755316 + ... + 7882796.

Almost surely, 2^996781077936 is an apocalyptic number.

It is an amenable number.

996781077936 is an abundant number, since it is smaller than the sum of its proper divisors (2191772189808).

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

996781077936 is a wasteful number, since it uses less digits than its factorization.

996781077936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135259 (or 135250 counting only the distinct ones).

The product of its (nonzero) digits is 216040608, while the sum is 72.

The spelling of 996781077936 in words is "nine hundred ninety-six billion, seven hundred eighty-one million, seventy-seven thousand, nine hundred thirty-six".