6901897538 has 8 divisors (see below), whose sum is σ = 10366524732. Its totient is φ = 3446389296.

The previous prime is 6901897537. The next prime is 6901897547. The reversal of 6901897538 is 8357981096.

It can be written as a sum of positive squares in 2 ways, for example, as 5755194769 + 1146702769 = 75863^2 + 33863^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×6901897538² = 95272379250100922888, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6901897531) 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, 2277845 + ... + 2280872.

Almost surely, 2^6901897538 is an apocalyptic number.

6901897538 is a deficient number, since it is larger than the sum of its proper divisors (3464627194).

6901897538 is a wasteful number, since it uses less digits than its factorization.

6901897538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4559476.

The product of its (nonzero) digits is 3265920, while the sum is 56.

The square root of 6901897538 is about 83077.6596805664. The cubic root of 6901897538 is about 1903.9527624703.

The spelling of 6901897538 in words is "six billion, nine hundred one million, eight hundred ninety-seven thousand, five hundred thirty-eight".