15768781052 has 24 divisors (see below), whose sum is σ = 29428847280. Its totient is φ = 7367212800.

The previous prime is 15768781051. The next prime is 15768781123. The reversal of 15768781052 is 25018786751.

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15768781051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 824699 + ... + 843602.

It is an arithmetic number, because the mean of its divisors is an integer number (1226201970).

Almost surely, 2^15768781052 is an apocalyptic number.

It is an amenable number.

15768781052 is a deficient number, since it is larger than the sum of its proper divisors (13660066228).

15768781052 is a wasteful number, since it uses less digits than its factorization.

15768781052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1668461 (or 1668459 counting only the distinct ones).

The product of its (nonzero) digits is 940800, while the sum is 50.

The spelling of 15768781052 in words is "fifteen billion, seven hundred sixty-eight million, seven hundred eighty-one thousand, fifty-two".