242778657455 has 8 divisors (see below), whose sum is σ = 291337429632. Its totient is φ = 194220898848.

The previous prime is 242778657437. The next prime is 242778657467. The reversal of 242778657455 is 554756877242.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 242778657455 - 2¹⁸ = 242778395311 is a prime.

It is a Duffinian 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, 452189 + ... + 830681.

It is an arithmetic number, because the mean of its divisors is an integer number (36417178704).

Almost surely, 2^242778657455 is an apocalyptic number.

242778657455 is a deficient number, since it is larger than the sum of its proper divisors (48558772177).

242778657455 is a wasteful number, since it uses less digits than its factorization.

242778657455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 506785.

The product of its digits is 131712000, while the sum is 62.

The spelling of 242778657455 in words is "two hundred forty-two billion, seven hundred seventy-eight million, six hundred fifty-seven thousand, four hundred fifty-five".