77218577430738 has 64 divisors (see below), whose sum is σ = 158361414412032. Its totient is φ = 25092238279680.

The previous prime is 77218577430697. The next prime is 77218577430739. The reversal of 77218577430738 is 83703477581277.

It is not an unprimeable number, because it can be changed into a prime (77218577430739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29707806 + ... + 32202342.

It is an arithmetic number, because the mean of its divisors is an integer number (2474397100188).

Almost surely, 2^{77218577430738} is an apocalyptic number.

77218577430738 is an abundant number, since it is smaller than the sum of its proper divisors (81142836981294).

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

77218577430738 is a wasteful number, since it uses less digits than its factorization.

77218577430738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2495219.

The product of its (nonzero) digits is 387233280, while the sum is 69.

The spelling of 77218577430738 in words is "seventy-seven trillion, two hundred eighteen billion, five hundred seventy-seven million, four hundred thirty thousand, seven hundred thirty-eight".