821847814513 has 16 divisors (see below), whose sum is σ = 979922741760. Its totient is φ = 680501894400.

The previous prime is 821847814493. The next prime is 821847814537. The reversal of 821847814513 is 315418748128.

It is not a de Polignac number, because 821847814513 - 2¹³ = 821847806321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (821847814553) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70879818 + ... + 70891411.

It is an arithmetic number, because the mean of its divisors is an integer number (61245171360).

Almost surely, 2^821847814513 is an apocalyptic number.

It is an amenable number.

821847814513 is a deficient number, since it is larger than the sum of its proper divisors (158074927247).

821847814513 is a wasteful number, since it uses less digits than its factorization.

821847814513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141771288.

The product of its digits is 1720320, while the sum is 52.

The spelling of 821847814513 in words is "eight hundred twenty-one billion, eight hundred forty-seven million, eight hundred fourteen thousand, five hundred thirteen".