77100804681 has 4 divisors (see below), whose sum is σ = 102801072912. Its totient is φ = 51400536452.

The previous prime is 77100804679. The next prime is 77100804689. The reversal of 77100804681 is 18640800177.

It is a happy number.

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 77100804681 - 2¹ = 77100804679 is a prime.

It is a super-3 number, since 3×77100804681³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (77100804689) 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, 12850134111 + ... + 12850134116.

It is an arithmetic number, because the mean of its divisors is an integer number (25700268228).

Almost surely, 2^77100804681 is an apocalyptic number.

It is an amenable number.

77100804681 is a deficient number, since it is larger than the sum of its proper divisors (25700268231).

77100804681 is a wasteful number, since it uses less digits than its factorization.

77100804681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25700268230.

The product of its (nonzero) digits is 75264, while the sum is 42.

The spelling of 77100804681 in words is "seventy-seven billion, one hundred million, eight hundred four thousand, six hundred eighty-one".