77406159601 has 4 divisors (see below), whose sum is σ = 77407092900. Its totient is φ = 77405226304.

The previous prime is 77406159583. The next prime is 77406159629. The reversal of 77406159601 is 10695160477.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10695160477 = 19 ⋅562903183.

It can be written as a sum of positive squares in 2 ways, for example, as 62307648225 + 15098511376 = 249615^2 + 122876^2 .

It is a cyclic number.

It is not a de Polignac number, because 77406159601 - 2²⁵ = 77372605169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77406159661) 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, 328636 + ... + 512653.

It is an arithmetic number, because the mean of its divisors is an integer number (19351773225).

Almost surely, 2^77406159601 is an apocalyptic number.

It is an amenable number.

77406159601 is a deficient number, since it is larger than the sum of its proper divisors (933299).

77406159601 is an equidigital number, since it uses as much as digits as its factorization.

77406159601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 933298.

The product of its (nonzero) digits is 317520, while the sum is 46.

The spelling of 77406159601 in words is "seventy-seven billion, four hundred six million, one hundred fifty-nine thousand, six hundred one".