406901041691 has 4 divisors (see below), whose sum is σ = 416825457384. Its totient is φ = 396976626000.

The previous prime is 406901041627. The next prime is 406901041721. The reversal of 406901041691 is 196140109604.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 406901041691 - 2⁶ = 406901041627 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41), and also a Moran number because the ratio is a prime number: 9924415651 = 406901041691 / (4 + 0 + 6 + 9 + 0 + 1 + 0 + 4 + 1 + 6 + 9 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (406901041601) 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, 4962207785 + ... + 4962207866.

It is an arithmetic number, because the mean of its divisors is an integer number (104206364346).

Almost surely, 2^406901041691 is an apocalyptic number.

406901041691 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

406901041691 is a deficient number, since it is larger than the sum of its proper divisors (9924415693).

406901041691 is an equidigital number, since it uses as much as digits as its factorization.

406901041691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9924415692.

The product of its (nonzero) digits is 46656, while the sum is 41.

The spelling of 406901041691 in words is "four hundred six billion, nine hundred one million, forty-one thousand, six hundred ninety-one".