77137402261243 has 2 divisors, whose sum is σ = 77137402261244. Its totient is φ = 77137402261242.

The previous prime is 77137402261189. The next prime is 77137402261247. The reversal of 77137402261243 is 34216220473177.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 77137402261243 - 2³³ = 77128812326651 is a prime.

It is a super-2 number, since 2×77137402261243² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (77137402261247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38568701130621 + 38568701130622.

It is an arithmetic number, because the mean of its divisors is an integer number (38568701130622).

Almost surely, 2^{77137402261243} is an apocalyptic number.

77137402261243 is a deficient number, since it is larger than the sum of its proper divisors (1).

77137402261243 is an equidigital number, since it uses as much as digits as its factorization.

77137402261243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2370816, while the sum is 49.

The spelling of 77137402261243 in words is "seventy-seven trillion, one hundred thirty-seven billion, four hundred two million, two hundred sixty-one thousand, two hundred forty-three".