77041987393 has 24 divisors (see below), whose sum is σ = 90234890592. Its totient is φ = 65584681344.

The previous prime is 77041987381. The next prime is 77041987397. The reversal of 77041987393 is 39378914077.

It is not a de Polignac number, because 77041987393 - 2⁵ = 77041987361 is a prime.

It is not an unprimeable number, because it can be changed into a prime (77041987397) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4248121 + ... + 4266217.

It is an arithmetic number, because the mean of its divisors is an integer number (3759787108).

Almost surely, 2^77041987393 is an apocalyptic number.

It is an amenable number.

77041987393 is a deficient number, since it is larger than the sum of its proper divisors (13192903199).

77041987393 is a wasteful number, since it uses less digits than its factorization.

77041987393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18701 (or 18694 counting only the distinct ones).

The product of its (nonzero) digits is 8001504, while the sum is 58.

The spelling of 77041987393 in words is "seventy-seven billion, forty-one million, nine hundred eighty-seven thousand, three hundred ninety-three".