76943897784 has 120 divisors (see below), whose sum is σ = 233367734160. Its totient is φ = 23675011776.

The previous prime is 76943897783. The next prime is 76943897831. The reversal of 76943897784 is 48779834967.

It is a super-2 number, since 2×76943897784² (a number of 23 digits) contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76943897783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 241792 + ... + 460815.

It is an arithmetic number, because the mean of its divisors is an integer number (1944731118).

Almost surely, 2^76943897784 is an apocalyptic number.

It is an amenable number.

76943897784 is an abundant number, since it is smaller than the sum of its proper divisors (156423836376).

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

76943897784 is a wasteful number, since it uses less digits than its factorization.

76943897784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 702651 (or 702625 counting only the distinct ones).

The product of its digits is 512096256, while the sum is 72.

The spelling of 76943897784 in words is "seventy-six billion, nine hundred forty-three million, eight hundred ninety-seven thousand, seven hundred eighty-four".