409540031647 has 2 divisors, whose sum is σ = 409540031648. Its totient is φ = 409540031646.

The previous prime is 409540031609. The next prime is 409540031651. The reversal of 409540031647 is 746130045904.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 409540031647 - 2¹¹ = 409540029599 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (409540031687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 204770015823 + 204770015824.

It is an arithmetic number, because the mean of its divisors is an integer number (204770015824).

Almost surely, 2^409540031647 is an apocalyptic number.

409540031647 is a deficient number, since it is larger than the sum of its proper divisors (1).

409540031647 is an equidigital number, since it uses as much as digits as its factorization.

409540031647 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 362880, while the sum is 43.

The spelling of 409540031647 in words is "four hundred nine billion, five hundred forty million, thirty-one thousand, six hundred forty-seven".