77132881381 has 8 divisors (see below), whose sum is σ = 78612336000. Its totient is φ = 75664345680.

The previous prime is 77132881379. The next prime is 77132881409. The reversal of 77132881381 is 18318823177.

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 77132881381 - 2¹ = 77132881379 is a prime.

It is a super-2 number, since 2×77132881381² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77132881361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2715466 + ... + 2743723.

It is an arithmetic number, because the mean of its divisors is an integer number (9826542000).

Almost surely, 2^77132881381 is an apocalyptic number.

77132881381 is a gapful number since it is divisible by the number (71) formed by its first and last digit.

It is an amenable number.

77132881381 is a deficient number, since it is larger than the sum of its proper divisors (1479454619).

77132881381 is a wasteful number, since it uses less digits than its factorization.

77132881381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5459459.

The product of its digits is 451584, while the sum is 49.

The spelling of 77132881381 in words is "seventy-seven billion, one hundred thirty-two million, eight hundred eighty-one thousand, three hundred eighty-one".