40708471657691 has 2 divisors, whose sum is σ = 40708471657692. Its totient is φ = 40708471657690.

The previous prime is 40708471657657. The next prime is 40708471657709. The reversal of 40708471657691 is 19675617480704.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40708471657691 - 2⁶ = 40708471657627 is a prime.

It is not a weakly prime, because it can be changed into another prime (40708471653691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20354235828845 + 20354235828846.

It is an arithmetic number, because the mean of its divisors is an integer number (20354235828846).

Almost surely, 2^{40708471657691} is an apocalyptic number.

40708471657691 is a deficient number, since it is larger than the sum of its proper divisors (1).

40708471657691 is an equidigital number, since it uses as much as digits as its factorization.

40708471657691 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 71124480, while the sum is 65.

The spelling of 40708471657691 in words is "forty trillion, seven hundred eight billion, four hundred seventy-one million, six hundred fifty-seven thousand, six hundred ninety-one".