40266243631 has 2 divisors, whose sum is σ = 40266243632. Its totient is φ = 40266243630.

The previous prime is 40266243599. The next prime is 40266243649. The reversal of 40266243631 is 13634266204.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40266243631 - 2⁵ = 40266243599 is a prime.

It is a super-2 number, since 2×40266243631² (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 (40266243331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20133121815 + 20133121816.

It is an arithmetic number, because the mean of its divisors is an integer number (20133121816).

Almost surely, 2^40266243631 is an apocalyptic number.

40266243631 is a deficient number, since it is larger than the sum of its proper divisors (1).

40266243631 is an equidigital number, since it uses as much as digits as its factorization.

40266243631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 124416, while the sum is 37.

The spelling of 40266243631 in words is "forty billion, two hundred sixty-six million, two hundred forty-three thousand, six hundred thirty-one".