86213777557 has 4 divisors (see below), whose sum is σ = 86222031040. Its totient is φ = 86205524076.

The previous prime is 86213777539. The next prime is 86213777567. The reversal of 86213777557 is 75577731268.

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 86213777557 - 2¹⁵ = 86213744789 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 (86213777527) 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, 4111053 + ... + 4131970.

It is an arithmetic number, because the mean of its divisors is an integer number (21555507760).

Almost surely, 2^86213777557 is an apocalyptic number.

It is an amenable number.

86213777557 is a deficient number, since it is larger than the sum of its proper divisors (8253483).

86213777557 is a wasteful number, since it uses less digits than its factorization.

86213777557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8253482.

The product of its digits is 17287200, while the sum is 58.

The spelling of 86213777557 in words is "eighty-six billion, two hundred thirteen million, seven hundred seventy-seven thousand, five hundred fifty-seven".