10540437491 has 2 divisors, whose sum is σ = 10540437492. Its totient is φ = 10540437490.

The previous prime is 10540437443. The next prime is 10540437499. The reversal of 10540437491 is 19473404501.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10540437491 is a prime.

It is a super-2 number, since 2×10540437491² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (10540437499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5270218745 + 5270218746.

It is an arithmetic number, because the mean of its divisors is an integer number (5270218746).

Almost surely, 2^10540437491 is an apocalyptic number.

10540437491 is a deficient number, since it is larger than the sum of its proper divisors (1).

10540437491 is an equidigital number, since it uses as much as digits as its factorization.

10540437491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60480, while the sum is 38.

The spelling of 10540437491 in words is "ten billion, five hundred forty million, four hundred thirty-seven thousand, four hundred ninety-one".