40187494547 has 2 divisors, whose sum is σ = 40187494548. Its totient is φ = 40187494546.

The previous prime is 40187494531. The next prime is 40187494549. The reversal of 40187494547 is 74549478104.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40187494547 - 2⁴ = 40187494531 is a prime.

Together with 40187494549, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (40187494549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20093747273 + 20093747274.

It is an arithmetic number, because the mean of its divisors is an integer number (20093747274).

Almost surely, 2^40187494547 is an apocalyptic number.

40187494547 is a deficient number, since it is larger than the sum of its proper divisors (1).

40187494547 is an equidigital number, since it uses as much as digits as its factorization.

40187494547 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4515840, while the sum is 53.

The spelling of 40187494547 in words is "forty billion, one hundred eighty-seven million, four hundred ninety-four thousand, five hundred forty-seven".