776399427401 has 24 divisors (see below), whose sum is σ = 888897093504. Its totient is φ = 673989039360.

The previous prime is 776399427379. The next prime is 776399427403. The reversal of 776399427401 is 104724993677.

It is a happy number.

It is not a de Polignac number, because 776399427401 - 2⁶ = 776399427337 is a prime.

It is a super-2 number, since 2×776399427401² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (776399427403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4739696 + ... + 4900766.

It is an arithmetic number, because the mean of its divisors is an integer number (37037378896).

Almost surely, 2^776399427401 is an apocalyptic number.

It is an amenable number.

776399427401 is a deficient number, since it is larger than the sum of its proper divisors (112497666103).

776399427401 is a wasteful number, since it uses less digits than its factorization.

776399427401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162401 (or 162384 counting only the distinct ones).

The product of its (nonzero) digits is 16003008, while the sum is 59.

The spelling of 776399427401 in words is "seven hundred seventy-six billion, three hundred ninety-nine million, four hundred twenty-seven thousand, four hundred one".