268909009217542 has 16 divisors (see below), whose sum is σ = 403683413300640. Its totient is φ = 134347913316288.

The previous prime is 268909009217503. The next prime is 268909009217587. The reversal of 268909009217542 is 245712900909862.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2385559 + ... + 23313277.

It is an arithmetic number, because the mean of its divisors is an integer number (25230213331290).

Almost surely, 2^{268909009217542} is an apocalyptic number.

268909009217542 is a deficient number, since it is larger than the sum of its proper divisors (134774404083098).

268909009217542 is a wasteful number, since it uses less digits than its factorization.

268909009217542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20932815.

The product of its (nonzero) digits is 39191040, while the sum is 64.

The spelling of 268909009217542 in words is "two hundred sixty-eight trillion, nine hundred nine billion, nine million, two hundred seventeen thousand, five hundred forty-two".