776476016068381 has 2 divisors, whose sum is σ = 776476016068382. Its totient is φ = 776476016068380.

The previous prime is 776476016068349. The next prime is 776476016068429. The reversal of 776476016068381 is 183860610674677.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 669972914307225 + 106503101761156 = 25883835^2 + 10320034^2 .

It is a cyclic number.

It is not a de Polignac number, because 776476016068381 - 2⁵ = 776476016068349 is a prime.

It is a super-2 number, since 2×776476016068381² (a number of 31 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 776476016068381.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (776476016068481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 388238008034190 + 388238008034191.

It is an arithmetic number, because the mean of its divisors is an integer number (388238008034191).

Almost surely, 2^{776476016068381} is an apocalyptic number.

It is an amenable number.

776476016068381 is a deficient number, since it is larger than the sum of its proper divisors (1).

776476016068381 is an equidigital number, since it uses as much as digits as its factorization.

776476016068381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 341397504, while the sum is 70.

The spelling of 776476016068381 in words is "seven hundred seventy-six trillion, four hundred seventy-six billion, sixteen million, sixty-eight thousand, three hundred eighty-one".