40374400991 has 2 divisors, whose sum is σ = 40374400992. Its totient is φ = 40374400990.

The previous prime is 40374400981. The next prime is 40374401017. The reversal of 40374400991 is 19900447304.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40374400991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40374400931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20187200495 + 20187200496.

It is an arithmetic number, because the mean of its divisors is an integer number (20187200496).

Almost surely, 2^40374400991 is an apocalyptic number.

40374400991 is a deficient number, since it is larger than the sum of its proper divisors (1).

40374400991 is an equidigital number, since it uses as much as digits as its factorization.

40374400991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108864, while the sum is 41.

The spelling of 40374400991 in words is "forty billion, three hundred seventy-four million, four hundred thousand, nine hundred ninety-one".