40138166527 has 2 divisors, whose sum is σ = 40138166528. Its totient is φ = 40138166526.

The previous prime is 40138166473. The next prime is 40138166531. The reversal of 40138166527 is 72566183104.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40138166527 - 2⁷ = 40138166399 is a prime.

It is a super-2 number, since 2×40138166527² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40138166567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20069083263 + 20069083264.

It is an arithmetic number, because the mean of its divisors is an integer number (20069083264).

Almost surely, 2^40138166527 is an apocalyptic number.

40138166527 is a deficient number, since it is larger than the sum of its proper divisors (1).

40138166527 is an equidigital number, since it uses as much as digits as its factorization.

40138166527 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 241920, while the sum is 43.

The spelling of 40138166527 in words is "forty billion, one hundred thirty-eight million, one hundred sixty-six thousand, five hundred twenty-seven".