76315777781 has 8 divisors (see below), whose sum is σ = 77613582240. Its totient is φ = 75018117328.

The previous prime is 76315777763. The next prime is 76315777787. The reversal of 76315777781 is 18777751367.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 76315777781 - 2⁶ = 76315777717 is a prime.

It is a super-3 number, since 3×76315777781³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (59).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 76315777781.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76315777787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2062415 + ... + 2099091.

It is an arithmetic number, because the mean of its divisors is an integer number (9701697780).

Almost surely, 2^76315777781 is an apocalyptic number.

It is an amenable number.

76315777781 is a deficient number, since it is larger than the sum of its proper divisors (1297804459).

76315777781 is a wasteful number, since it uses less digits than its factorization.

76315777781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72003.

The product of its digits is 12101040, while the sum is 59.

The spelling of 76315777781 in words is "seventy-six billion, three hundred fifteen million, seven hundred seventy-seven thousand, seven hundred eighty-one".