40111506497 has 2 divisors, whose sum is σ = 40111506498. Its totient is φ = 40111506496.

The previous prime is 40111506431. The next prime is 40111506509. The reversal of 40111506497 is 79460511104.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40028405041 + 83101456 = 200071^2 + 9116^2 .

It is a cyclic number.

It is not a de Polignac number, because 40111506497 - 2¹² = 40111502401 is a prime.

It is a super-2 number, since 2×40111506497² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 40111506497.

It is not a weakly prime, because it can be changed into another prime (40111506427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20055753248 + 20055753249.

It is an arithmetic number, because the mean of its divisors is an integer number (20055753249).

Almost surely, 2^40111506497 is an apocalyptic number.

It is an amenable number.

40111506497 is a deficient number, since it is larger than the sum of its proper divisors (1).

40111506497 is an equidigital number, since it uses as much as digits as its factorization.

40111506497 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30240, while the sum is 38.

The spelling of 40111506497 in words is "forty billion, one hundred eleven million, five hundred six thousand, four hundred ninety-seven".