77969378790 has 32 divisors (see below), whose sum is σ = 207918344160. Its totient is φ = 20791834272.

The previous prime is 77969378789. The next prime is 77969378797. The reversal of 77969378790 is 9787396977.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77969378797) 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 15 ways as a sum of consecutive naturals, for example, 144387469 + ... + 144388008.

It is an arithmetic number, because the mean of its divisors is an integer number (6497448255).

Almost surely, 2^77969378790 is an apocalyptic number.

77969378790 is an abundant number, since it is smaller than the sum of its proper divisors (129948965370).

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

77969378790 is a wasteful number, since it uses less digits than its factorization.

77969378790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288775493 (or 288775487 counting only the distinct ones).

The product of its (nonzero) digits is 252047376, while the sum is 72.

The spelling of 77969378790 in words is "seventy-seven billion, nine hundred sixty-nine million, three hundred seventy-eight thousand, seven hundred ninety".