15068121856 has 18 divisors (see below), whose sum is σ = 30077384372. Its totient is φ = 7534060800.

The previous prime is 15068121833. The next prime is 15068121907. The reversal of 15068121856 is 65812186051.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 29429670 + ... + 29430181.

Almost surely, 2^15068121856 is an apocalyptic number.

15068121856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

15068121856 is a deficient number, since it is larger than the sum of its proper divisors (15009262516).

15068121856 is an frugal number, since it uses more digits than its factorization.

15068121856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58859867 (or 58859853 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 43.

The spelling of 15068121856 in words is "fifteen billion, sixty-eight million, one hundred twenty-one thousand, eight hundred fifty-six".