77169617987074 has 32 divisors (see below), whose sum is σ = 121127860410480. Its totient is φ = 36833071122432.

The previous prime is 77169617987039. The next prime is 77169617987087. The reversal of 77169617987074 is 47078971696177.

It can be written as a sum of positive squares in 8 ways, for example, as 35520110015625 + 41649507971449 = 5959875^2 + 6453643^2 .

It is a junction number, because it is equal to n+sod(n) for n = 77169617986985 and 77169617987003.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 371674362 + ... + 371881930.

Almost surely, 2^{77169617987074} is an apocalyptic number.

77169617987074 is a gapful number since it is divisible by the number (74) formed by its first and last digit.

77169617987074 is a deficient number, since it is larger than the sum of its proper divisors (43958242423406).

77169617987074 is a wasteful number, since it uses less digits than its factorization.

77169617987074 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302454.

The product of its (nonzero) digits is 1568294784, while the sum is 79.

The spelling of 77169617987074 in words is "seventy-seven trillion, one hundred sixty-nine billion, six hundred seventeen million, nine hundred eighty-seven thousand, seventy-four".