77486520893 has 4 divisors (see below), whose sum is σ = 77648288640. Its totient is φ = 77324753148.

The previous prime is 77486520871. The next prime is 77486520899. The reversal of 77486520893 is 39802568477.

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 77486520893 - 2³² = 73191553597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77486520899) 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, 80883155 + ... + 80884112.

It is an arithmetic number, because the mean of its divisors is an integer number (19412072160).

Almost surely, 2^77486520893 is an apocalyptic number.

It is an amenable number.

77486520893 is a deficient number, since it is larger than the sum of its proper divisors (161767747).

77486520893 is a wasteful number, since it uses less digits than its factorization.

77486520893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161767746.

The product of its (nonzero) digits is 20321280, while the sum is 59.

The spelling of 77486520893 in words is "seventy-seven billion, four hundred eighty-six million, five hundred twenty thousand, eight hundred ninety-three".