3906494297491 has 8 divisors (see below), whose sum is σ = 3908114829344. Its totient is φ = 3904874110080.

The previous prime is 3906494297471. The next prime is 3906494297507. The reversal of 3906494297491 is 1947924946093.

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

It is a cyclic number.

It is not a de Polignac number, because 3906494297491 - 2¹¹ = 3906494295443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3906494297471) 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, 23974906 + ... + 24137296.

It is an arithmetic number, because the mean of its divisors is an integer number (488514353668).

Almost surely, 2^{3906494297491} is an apocalyptic number.

3906494297491 is a deficient number, since it is larger than the sum of its proper divisors (1620531853).

3906494297491 is a wasteful number, since it uses less digits than its factorization.

3906494297491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172221.

The product of its (nonzero) digits is 105815808, while the sum is 67.

The spelling of 3906494297491 in words is "three trillion, nine hundred six billion, four hundred ninety-four million, two hundred ninety-seven thousand, four hundred ninety-one".