242688442491 has 40 divisors (see below), whose sum is σ = 397778611824. Its totient is φ = 146233615680.

The previous prime is 242688442483. The next prime is 242688442517. The reversal of 242688442491 is 194244886242.

It is not a de Polignac number, because 242688442491 - 2³ = 242688442483 is a prime.

It is a super-3 number, since 3×242688442491³ (a number of 35 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (242688442421) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 633076 + ... + 941361.

Almost surely, 2^242688442491 is an apocalyptic number.

242688442491 is a deficient number, since it is larger than the sum of its proper divisors (155090169333).

242688442491 is a wasteful number, since it uses less digits than its factorization.

242688442491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1574633 (or 1574624 counting only the distinct ones).

The product of its digits is 7077888, while the sum is 54.

The spelling of 242688442491 in words is "two hundred forty-two billion, six hundred eighty-eight million, four hundred forty-two thousand, four hundred ninety-one".