77773284718875 has 112 divisors (see below), whose sum is σ = 145639194041952. Its totient is φ = 41446541505600.

The previous prime is 77773284718859. The next prime is 77773284718879. The reversal of 77773284718875 is 57881748237777.

77773284718875 is a `hidden beast` number, since 7 + 7 + 7 + 7 + 328 + 47 + 188 + 75 = 666.

It is not a de Polignac number, because 77773284718875 - 2⁴ = 77773284718859 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (81).

It is a junction number, because it is equal to n+sod(n) for n = 77773284718794 and 77773284718803.

It is not an unprimeable number, because it can be changed into a prime (77773284718879) by changing a digit.

It is a polite number, since it can be written in 111 ways as a sum of consecutive naturals, for example, 116032452 + ... + 116700798.

Almost surely, 2^{77773284718875} is an apocalyptic number.

77773284718875 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

77773284718875 is a deficient number, since it is larger than the sum of its proper divisors (67865909323077).

77773284718875 is an equidigital number, since it uses as much as digits as its factorization.

77773284718875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 669657 (or 669632 counting only the distinct ones).

The product of its digits is 7228354560, while the sum is 81.

The spelling of 77773284718875 in words is "seventy-seven trillion, seven hundred seventy-three billion, two hundred eighty-four million, seven hundred eighteen thousand, eight hundred seventy-five".