77742940001 has 4 divisors (see below), whose sum is σ = 77786446512. Its totient is φ = 77699433492.

The previous prime is 77742939997. The next prime is 77742940043. The reversal of 77742940001 is 10004924777.

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: 10004924777 = 383 ⋅26122519.

It is a cyclic number.

It is not a de Polignac number, because 77742940001 - 2² = 77742939997 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 (77742940081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21750575 + ... + 21754148.

It is an arithmetic number, because the mean of its divisors is an integer number (19446611628).

Almost surely, 2^77742940001 is an apocalyptic number.

It is an amenable number.

77742940001 is a deficient number, since it is larger than the sum of its proper divisors (43506511).

77742940001 is a wasteful number, since it uses less digits than its factorization.

77742940001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43506510.

The product of its (nonzero) digits is 98784, while the sum is 41.

The spelling of 77742940001 in words is "seventy-seven billion, seven hundred forty-two million, nine hundred forty thousand, one".