77900488893 has 12 divisors (see below), whose sum is σ = 112527997660. Its totient is φ = 51931319616.

The previous prime is 77900488891. The next prime is 77900488909. The reversal of 77900488893 is 39888400977.

77900488893 is a `hidden beast` number, since 7 + 79 + 0 + 0 + 488 + 89 + 3 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 36911247129 + 40989241764 = 192123^2 + 202458^2 .

It is not a de Polignac number, because 77900488893 - 2¹ = 77900488891 is a prime.

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 77900488893.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77900488891) 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 11 ways as a sum of consecutive naturals, for example, 29505 + ... + 395817.

Almost surely, 2^77900488893 is an apocalyptic number.

It is an amenable number.

77900488893 is a deficient number, since it is larger than the sum of its proper divisors (34627508767).

77900488893 is a wasteful number, since it uses less digits than its factorization.

77900488893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389948 (or 389945 counting only the distinct ones).

The product of its (nonzero) digits is 24385536, while the sum is 63.

The spelling of 77900488893 in words is "seventy-seven billion, nine hundred million, four hundred eighty-eight thousand, eight hundred ninety-three".