7928642857144 has 16 divisors (see below), whose sum is σ = 14928407056800. Its totient is φ = 3947734308672.

The previous prime is 7928642857123. The next prime is 7928642857189. The reversal of 7928642857144 is 4417582468297.

It is a super-2 number, since 2×7928642857144² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 7928642857144.

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, 2073387957 + ... + 2073391780.

It is an arithmetic number, because the mean of its divisors is an integer number (933025441050).

Almost surely, 2^{7928642857144} is an apocalyptic number.

It is an amenable number.

7928642857144 is a deficient number, since it is larger than the sum of its proper divisors (6999764199656).

7928642857144 is a wasteful number, since it uses less digits than its factorization.

7928642857144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4146779982 (or 4146779978 counting only the distinct ones).

The product of its digits is 216760320, while the sum is 67.

The spelling of 7928642857144 in words is "seven trillion, nine hundred twenty-eight billion, six hundred forty-two million, eight hundred fifty-seven thousand, one hundred forty-four".