15771072012 has 24 divisors (see below), whose sum is σ = 37156444416. Its totient is φ = 5205984528.

The previous prime is 15771071983. The next prime is 15771072043. The reversal of 15771072012 is 21027017751.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6378648 + ... + 6381119.

It is an arithmetic number, because the mean of its divisors is an integer number (1548185184).

Almost surely, 2^15771072012 is an apocalyptic number.

15771072012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

15771072012 is an abundant number, since it is smaller than the sum of its proper divisors (21385372404).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

15771072012 is a wasteful number, since it uses less digits than its factorization.

15771072012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12759877 (or 12759875 counting only the distinct ones).

The product of its (nonzero) digits is 6860, while the sum is 33.

Adding to 15771072012 its reverse (21027017751), we get a palindrome (36798089763).

The spelling of 15771072012 in words is "fifteen billion, seven hundred seventy-one million, seventy-two thousand, twelve".