40989656723 has 2 divisors, whose sum is σ = 40989656724. Its totient is φ = 40989656722.

The previous prime is 40989656681. The next prime is 40989656761. The reversal of 40989656723 is 32765698904.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40989656723 - 2¹⁰ = 40989655699 is a prime.

It is not a weakly prime, because it can be changed into another prime (40989656623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20494828361 + 20494828362.

It is an arithmetic number, because the mean of its divisors is an integer number (20494828362).

Almost surely, 2^40989656723 is an apocalyptic number.

40989656723 is a deficient number, since it is larger than the sum of its proper divisors (1).

40989656723 is an equidigital number, since it uses as much as digits as its factorization.

40989656723 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19595520, while the sum is 59.

The spelling of 40989656723 in words is "forty billion, nine hundred eighty-nine million, six hundred fifty-six thousand, seven hundred twenty-three".