126654640523 has 16 divisors (see below), whose sum is σ = 134164644096. Its totient is φ = 119312408160.

The previous prime is 126654640517. The next prime is 126654640559. The reversal of 126654640523 is 325046456621.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 126654640523 - 2⁶ = 126654640459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126654240523) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10600733 + ... + 10612673.

It is an arithmetic number, because the mean of its divisors is an integer number (8385290256).

Almost surely, 2^126654640523 is an apocalyptic number.

126654640523 is a deficient number, since it is larger than the sum of its proper divisors (7510003573).

126654640523 is a wasteful number, since it uses less digits than its factorization.

126654640523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18914.

The product of its (nonzero) digits is 1036800, while the sum is 44.

The spelling of 126654640523 in words is "one hundred twenty-six billion, six hundred fifty-four million, six hundred forty thousand, five hundred twenty-three".