77628305673280 has 56 divisors (see below), whose sum is σ = 184859019753408. Its totient is φ = 31050210774528.

The previous prime is 77628305673263. The next prime is 77628305673287. The reversal of 77628305673280 is 8237650382677.

It is a hoax number, since the sum of its digits (64) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (64).

It is not an unprimeable number, because it can be changed into a prime (77628305673287) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4640877 + ... + 13296403.

It is an arithmetic number, because the mean of its divisors is an integer number (3301053924168).

Almost surely, 2^{77628305673280} is an apocalyptic number.

It is an amenable number.

77628305673280 is an abundant number, since it is smaller than the sum of its proper divisors (107230714080128).

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

77628305673280 is a wasteful number, since it uses less digits than its factorization.

77628305673280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8683571 (or 8683561 counting only the distinct ones).

The product of its (nonzero) digits is 142248960, while the sum is 64.

The spelling of 77628305673280 in words is "seventy-seven trillion, six hundred twenty-eight billion, three hundred five million, six hundred seventy-three thousand, two hundred eighty".