248742857656 has 8 divisors (see below), whose sum is σ = 466392858120. Its totient is φ = 124371428824.

The previous prime is 248742857621. The next prime is 248742857677. The reversal of 248742857656 is 656758247842.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15546428596 + ... + 15546428611.

It is an arithmetic number, because the mean of its divisors is an integer number (58299107265).

Almost surely, 2^248742857656 is an apocalyptic number.

It is an amenable number.

248742857656 is a deficient number, since it is larger than the sum of its proper divisors (217650000464).

248742857656 is a wasteful number, since it uses less digits than its factorization.

248742857656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31092857213 (or 31092857209 counting only the distinct ones).

The product of its digits is 180633600, while the sum is 64.

The spelling of 248742857656 in words is "two hundred forty-eight billion, seven hundred forty-two million, eight hundred fifty-seven thousand, six hundred fifty-six".