77311326451 has 4 divisors (see below), whose sum is σ = 77311884600. Its totient is φ = 77310768304.

The previous prime is 77311326431. The next prime is 77311326473. The reversal of 77311326451 is 15462311377.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 15462311377 = 3049 ⋅5071273.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77311326451 is a prime.

It is a super-2 number, since 2×77311326451² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77311326431) 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, 103695 + ... + 406663.

It is an arithmetic number, because the mean of its divisors is an integer number (19327971150).

Almost surely, 2^77311326451 is an apocalyptic number.

77311326451 is a deficient number, since it is larger than the sum of its proper divisors (558149).

77311326451 is a wasteful number, since it uses less digits than its factorization.

77311326451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 558148.

The product of its digits is 105840, while the sum is 40.

The spelling of 77311326451 in words is "seventy-seven billion, three hundred eleven million, three hundred twenty-six thousand, four hundred fifty-one".