77788406354 has 8 divisors (see below), whose sum is σ = 116688051468. Its totient is φ = 38892389200.

The previous prime is 77788406351. The next prime is 77788406383. The reversal of 77788406354 is 45360488777.

It can be written as a sum of positive squares in 2 ways, for example, as 77243417329 + 544989025 = 277927^2 + 23345^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 77788406293 and 77788406302.

It is not an unprimeable number, because it can be changed into a prime (77788406351) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 852737 + ... + 939540.

Almost surely, 2^77788406354 is an apocalyptic number.

77788406354 is a deficient number, since it is larger than the sum of its proper divisors (38899645114).

77788406354 is a wasteful number, since it uses less digits than its factorization.

77788406354 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1813980.

The product of its (nonzero) digits is 31610880, while the sum is 59.

The spelling of 77788406354 in words is "seventy-seven billion, seven hundred eighty-eight million, four hundred six thousand, three hundred fifty-four".