40126456697 has 8 divisors (see below), whose sum is σ = 40679747976. Its totient is φ = 39573263232.

The previous prime is 40126456693. The next prime is 40126456717. The reversal of 40126456697 is 79665462104.

It can be written as a sum of positive squares in 4 ways, for example, as 4222270441 + 35904186256 = 64979^2 + 189484^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40126456697 - 2² = 40126456693 is a prime.

It is a super-2 number, since 2×40126456697² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40126456693) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1268963 + ... + 1300199.

It is an arithmetic number, because the mean of its divisors is an integer number (5084968497).

Almost surely, 2^40126456697 is an apocalyptic number.

It is an amenable number.

40126456697 is a deficient number, since it is larger than the sum of its proper divisors (553291279).

40126456697 is a wasteful number, since it uses less digits than its factorization.

40126456697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48907.

The product of its (nonzero) digits is 2177280, while the sum is 50.

The spelling of 40126456697 in words is "forty billion, one hundred twenty-six million, four hundred fifty-six thousand, six hundred ninety-seven".