77956425133 has 8 divisors (see below), whose sum is σ = 80113424760. Its totient is φ = 75802060800.

The previous prime is 77956425109. The next prime is 77956425161. The reversal of 77956425133 is 33152465977.

It can be written as a sum of positive squares in 4 ways, for example, as 74645343369 + 3311081764 = 273213^2 + 57542^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 77956425133 - 2²⁹ = 77419554221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77956426133) 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, 598768 + ... + 717241.

It is an arithmetic number, because the mean of its divisors is an integer number (10014178095).

Almost surely, 2^77956425133 is an apocalyptic number.

It is an amenable number.

77956425133 is a deficient number, since it is larger than the sum of its proper divisors (2156999627).

77956425133 is a wasteful number, since it uses less digits than its factorization.

77956425133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1317647.

The product of its digits is 4762800, while the sum is 52.

The spelling of 77956425133 in words is "seventy-seven billion, nine hundred fifty-six million, four hundred twenty-five thousand, one hundred thirty-three".