15428861834 has 12 divisors (see below), whose sum is σ = 23311047474. Its totient is φ = 7658912232.

The previous prime is 15428861813. The next prime is 15428861857. The reversal of 15428861834 is 43816882451.

It can be written as a sum of positive squares in only one way, i.e., 11906083225 + 3522778609 = 109115^2 + 59353^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 160997 + ... + 238280.

Almost surely, 2^15428861834 is an apocalyptic number.

15428861834 is a deficient number, since it is larger than the sum of its proper divisors (7882185640).

15428861834 is an equidigital number, since it uses as much as digits as its factorization.

15428861834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399557 (or 399418 counting only the distinct ones).

The product of its digits is 1474560, while the sum is 50.

The spelling of 15428861834 in words is "fifteen billion, four hundred twenty-eight million, eight hundred sixty-one thousand, eight hundred thirty-four".