77311326437 has 4 divisors (see below), whose sum is σ = 80672688480. Its totient is φ = 73949964396.

The previous prime is 77311326431. The next prime is 77311326473. The reversal of 77311326437 is 73462311377.

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.

It is a cyclic number.

It is not a de Polignac number, because 77311326437 - 2⁸ = 77311326181 is a prime.

It is a super-2 number, since 2×77311326437² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent 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, 1680680987 + ... + 1680681032.

It is an arithmetic number, because the mean of its divisors is an integer number (20168172120).

Almost surely, 2^77311326437 is an apocalyptic number.

It is an amenable number.

77311326437 is a deficient number, since it is larger than the sum of its proper divisors (3361362043).

77311326437 is a wasteful number, since it uses less digits than its factorization.

77311326437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3361362042.

The product of its digits is 444528, while the sum is 44.

The spelling of 77311326437 in words is "seventy-seven billion, three hundred eleven million, three hundred twenty-six thousand, four hundred thirty-seven".