77081040401 has 4 divisors (see below), whose sum is σ = 77635580400. Its totient is φ = 76526500404.

The previous prime is 77081040383. The next prime is 77081040503. The reversal of 77081040401 is 10404018077.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 10404018077 = 27611 ⋅376807.

It is a cyclic number.

It is not a de Polignac number, because 77081040401 - 2³⁴ = 59901171217 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (77081040901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 277269791 + ... + 277270068.

It is an arithmetic number, because the mean of its divisors is an integer number (19408895100).

Almost surely, 2^77081040401 is an apocalyptic number.

It is an amenable number.

77081040401 is a deficient number, since it is larger than the sum of its proper divisors (554539999).

77081040401 is a wasteful number, since it uses less digits than its factorization.

77081040401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 554539998.

The product of its (nonzero) digits is 6272, while the sum is 32.

Adding to 77081040401 its reverse (10404018077), we get a palindrome (87485058478).

The spelling of 77081040401 in words is "seventy-seven billion, eighty-one million, forty thousand, four hundred one".