77955491426 has 8 divisors (see below), whose sum is σ = 120965417820. Its totient is φ = 37633685488.

The previous prime is 77955491417. The next prime is 77955491447. The reversal of 77955491426 is 62419455977.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 77810313025 + 145178401 = 278945^2 + 12049^2 .

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

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 672030041 + ... + 672030156.

Almost surely, 2^77955491426 is an apocalyptic number.

77955491426 is a deficient number, since it is larger than the sum of its proper divisors (43009926394).

77955491426 is a wasteful number, since it uses less digits than its factorization.

77955491426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1344060228.

The product of its digits is 19051200, while the sum is 59.

The spelling of 77955491426 in words is "seventy-seven billion, nine hundred fifty-five million, four hundred ninety-one thousand, four hundred twenty-six".