845019696887 has 4 divisors (see below), whose sum is σ = 845023979736. Its totient is φ = 845015414040.

The previous prime is 845019696811. The next prime is 845019696901. The reversal of 845019696887 is 788696910548.

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

It is a cyclic number.

It is not a de Polignac number, because 845019696887 - 2²⁶ = 844952588023 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 845019696887.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (845015696887) 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, 1830413 + ... + 2245094.

It is an arithmetic number, because the mean of its divisors is an integer number (211255994934).

Almost surely, 2^845019696887 is an apocalyptic number.

845019696887 is a deficient number, since it is larger than the sum of its proper divisors (4282849).

845019696887 is a wasteful number, since it uses less digits than its factorization.

845019696887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4282848.

The product of its (nonzero) digits is 209018880, while the sum is 71.

The spelling of 845019696887 in words is "eight hundred forty-five billion, nineteen million, six hundred ninety-six thousand, eight hundred eighty-seven".