77804196723 has 24 divisors (see below), whose sum is σ = 122611746816. Its totient is φ = 47149753200.

The previous prime is 77804196719. The next prime is 77804196751. The reversal of 77804196723 is 32769140877.

77804196723 is a `hidden beast` number, since 77 + 80 + 419 + 67 + 23 = 666.

It is not a de Polignac number, because 77804196723 - 2² = 77804196719 is a prime.

It is a super-2 number, since 2×77804196723² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 77804196723.

It is not an unprimeable number, because it can be changed into a prime (77804196713) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1306078 + ... + 1364348.

It is an arithmetic number, because the mean of its divisors is an integer number (5108822784).

Almost surely, 2^77804196723 is an apocalyptic number.

77804196723 is a deficient number, since it is larger than the sum of its proper divisors (44807550093).

77804196723 is a wasteful number, since it uses less digits than its factorization.

77804196723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71775 (or 71772 counting only the distinct ones).

The product of its (nonzero) digits is 3556224, while the sum is 54.

The spelling of 77804196723 in words is "seventy-seven billion, eight hundred four million, one hundred ninety-six thousand, seven hundred twenty-three".