3903645842681 has 8 divisors (see below), whose sum is σ = 4275179280960. Its totient is φ = 3542291402832.

The previous prime is 3903645842639. The next prime is 3903645842683. The reversal of 3903645842681 is 1862485463093.

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

It is not a de Polignac number, because 3903645842681 - 2³⁰ = 3902572100857 is a prime.

It is a super-2 number, since 2×3903645842681² (a number of 26 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (59).

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 3903645842681.

It is not an unprimeable number, because it can be changed into a prime (3903645842683) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2544748805 + ... + 2544750338.

It is an arithmetic number, because the mean of its divisors is an integer number (534397410120).

Almost surely, 2^{3903645842681} is an apocalyptic number.

It is an amenable number.

3903645842681 is a deficient number, since it is larger than the sum of its proper divisors (371533438279).

3903645842681 is a wasteful number, since it uses less digits than its factorization.

3903645842681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5089499215.

The product of its (nonzero) digits is 29859840, while the sum is 59.

The spelling of 3903645842681 in words is "three trillion, nine hundred three billion, six hundred forty-five million, eight hundred forty-two thousand, six hundred eighty-one".