84985251321599 has 4 divisors (see below), whose sum is σ = 84985300179936. Its totient is φ = 84985202463264.

The previous prime is 84985251321587. The next prime is 84985251321623. The reversal of 84985251321599 is 99512315258948.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84985251321599 is a prime.

It is a super-2 number, since 2×84985251321599² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84985251321539) 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, 21719879 + ... + 25332264.

It is an arithmetic number, because the mean of its divisors is an integer number (21246325044984).

Almost surely, 2^{84985251321599} is an apocalyptic number.

84985251321599 is a deficient number, since it is larger than the sum of its proper divisors (48858337).

84985251321599 is a wasteful number, since it uses less digits than its factorization.

84985251321599 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48858336.

The product of its digits is 279936000, while the sum is 71.

The spelling of 84985251321599 in words is "eighty-four trillion, nine hundred eighty-five billion, two hundred fifty-one million, three hundred twenty-one thousand, five hundred ninety-nine".