77903800891 has 8 divisors (see below), whose sum is σ = 94270145760. Its totient is φ = 62846763648.

The previous prime is 77903800841. The next prime is 77903800901. The reversal of 77903800891 is 19800830977.

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 77903800891 - 2⁷ = 77903800763 is a prime.

It is not an unprimeable number, because it can be changed into a prime (77903800841) 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, 327326776 + ... + 327327013.

It is an arithmetic number, because the mean of its divisors is an integer number (11783768220).

Almost surely, 2^77903800891 is an apocalyptic number.

77903800891 is a deficient number, since it is larger than the sum of its proper divisors (16366344869).

77903800891 is a wasteful number, since it uses less digits than its factorization.

77903800891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 654653813.

The product of its (nonzero) digits is 762048, while the sum is 52.

The spelling of 77903800891 in words is "seventy-seven billion, nine hundred three million, eight hundred thousand, eight hundred ninety-one".