2685498820921 has 16 divisors (see below), whose sum is σ = 3093164798976. Its totient is φ = 2283889070736.

The previous prime is 2685498820891. The next prime is 2685498820957. The reversal of 2685498820921 is 1290288945862.

It is not a de Polignac number, because 2685498820921 - 2¹⁷ = 2685498689849 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2685498820421) 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, 1460431 + ... + 2739316.

It is an arithmetic number, because the mean of its divisors is an integer number (193322799936).

Almost surely, 2^{2685498820921} is an apocalyptic number.

It is an amenable number.

2685498820921 is a deficient number, since it is larger than the sum of its proper divisors (407665978055).

2685498820921 is a wasteful number, since it uses less digits than its factorization.

2685498820921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4200468.

The product of its (nonzero) digits is 39813120, while the sum is 64.

The spelling of 2685498820921 in words is "two trillion, six hundred eighty-five billion, four hundred ninety-eight million, eight hundred twenty thousand, nine hundred twenty-one".