126654640535 has 4 divisors (see below), whose sum is σ = 151985568648. Its totient is φ = 101323712424.

The previous prime is 126654640517. The next prime is 126654640559. The reversal of 126654640535 is 535046456621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 535046456621 = 887 ⋅603209083.

It is a cyclic number.

It is not a de Polignac number, because 126654640535 - 2¹⁶ = 126654574999 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 126654640535.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12665464049 + ... + 12665464058.

It is an arithmetic number, because the mean of its divisors is an integer number (37996392162).

Almost surely, 2^126654640535 is an apocalyptic number.

126654640535 is a deficient number, since it is larger than the sum of its proper divisors (25330928113).

126654640535 is an equidigital number, since it uses as much as digits as its factorization.

126654640535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25330928112.

The product of its (nonzero) digits is 2592000, while the sum is 47.

The spelling of 126654640535 in words is "one hundred twenty-six billion, six hundred fifty-four million, six hundred forty thousand, five hundred thirty-five".