40902531491 has 2 divisors, whose sum is σ = 40902531492. Its totient is φ = 40902531490.

The previous prime is 40902531473. The next prime is 40902531517. The reversal of 40902531491 is 19413520904.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40902531491 - 2³⁴ = 23722662307 is a prime.

It is not a weakly prime, because it can be changed into another prime (40902531421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20451265745 + 20451265746.

It is an arithmetic number, because the mean of its divisors is an integer number (20451265746).

Almost surely, 2^40902531491 is an apocalyptic number.

40902531491 is a deficient number, since it is larger than the sum of its proper divisors (1).

40902531491 is an equidigital number, since it uses as much as digits as its factorization.

40902531491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38880, while the sum is 38.

The spelling of 40902531491 in words is "forty billion, nine hundred two million, five hundred thirty-one thousand, four hundred ninety-one".