40025550491 has 2 divisors, whose sum is σ = 40025550492. Its totient is φ = 40025550490.

The previous prime is 40025550473. The next prime is 40025550493. The reversal of 40025550491 is 19405552004.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40025550491 is a prime.

Together with 40025550493, 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 (40025550493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20012775245 + 20012775246.

It is an arithmetic number, because the mean of its divisors is an integer number (20012775246).

Almost surely, 2^40025550491 is an apocalyptic number.

40025550491 is a deficient number, since it is larger than the sum of its proper divisors (1).

40025550491 is an equidigital number, since it uses as much as digits as its factorization.

40025550491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36000, while the sum is 35.

The spelling of 40025550491 in words is "forty billion, twenty-five million, five hundred fifty thousand, four hundred ninety-one".