6901644894 has 16 divisors (see below), whose sum is σ = 13864099968. Its totient is φ = 2290413272.

The previous prime is 6901644889. The next prime is 6901644943. The reversal of 6901644894 is 4984461096.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2532282 + ... + 2535005.

It is an arithmetic number, because the mean of its divisors is an integer number (866506248).

Almost surely, 2^6901644894 is an apocalyptic number.

6901644894 is an abundant number, since it is smaller than the sum of its proper divisors (6962455074).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6901644894 is a wasteful number, since it uses less digits than its factorization.

6901644894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5067519.

The product of its (nonzero) digits is 1492992, while the sum is 51.

The square root of 6901644894 is about 83076.1391375406. The cubic root of 6901644894 is about 1903.9295307861.

The spelling of 6901644894 in words is "six billion, nine hundred one million, six hundred forty-four thousand, eight hundred ninety-four".