40126772691 has 6 divisors (see below), whose sum is σ = 57960893900. Its totient is φ = 26751181788.

The previous prime is 40126772683. The next prime is 40126772711. The reversal of 40126772691 is 19627762104.

It is not a de Polignac number, because 40126772691 - 2³ = 40126772683 is a prime.

It is a super-2 number, since 2×40126772691² (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 (40126772671) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2229265141 + ... + 2229265158.

Almost surely, 2^40126772691 is an apocalyptic number.

40126772691 is a deficient number, since it is larger than the sum of its proper divisors (17834121209).

40126772691 is a wasteful number, since it uses less digits than its factorization.

40126772691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4458530305 (or 4458530302 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 45.

The spelling of 40126772691 in words is "forty billion, one hundred twenty-six million, seven hundred seventy-two thousand, six hundred ninety-one".