15151878668 has 12 divisors (see below), whose sum is σ = 26536857480. Its totient is φ = 7569919392.

The previous prime is 15151878647. The next prime is 15151878683. The reversal of 15151878668 is 86687815151.

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, 1499321 + ... + 1509392.

It is an arithmetic number, because the mean of its divisors is an integer number (2211404790).

Almost surely, 2^15151878668 is an apocalyptic number.

It is an amenable number.

15151878668 is a deficient number, since it is larger than the sum of its proper divisors (11384978812).

15151878668 is a wasteful number, since it uses less digits than its factorization.

15151878668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3009976 (or 3009974 counting only the distinct ones).

The product of its digits is 3225600, while the sum is 56.

The spelling of 15151878668 in words is "fifteen billion, one hundred fifty-one million, eight hundred seventy-eight thousand, six hundred sixty-eight".