77984613690 has 64 divisors (see below), whose sum is σ = 196791154560. Its totient is φ = 19749623040.

The previous prime is 77984613683. The next prime is 77984613691. The reversal of 77984613690 is 9631648977.

It is a super-2 number, since 2×77984613690² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (77984613691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 681664 + ... + 787803.

It is an arithmetic number, because the mean of its divisors is an integer number (3074861790).

Almost surely, 2^77984613690 is an apocalyptic number.

77984613690 is an abundant number, since it is smaller than the sum of its proper divisors (118806540870).

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

77984613690 is a wasteful number, since it uses less digits than its factorization.

77984613690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1469567.

The product of its (nonzero) digits is 13716864, while the sum is 60.

The spelling of 77984613690 in words is "seventy-seven billion, nine hundred eighty-four million, six hundred thirteen thousand, six hundred ninety".