15768781050 has 96 divisors (see below), whose sum is σ = 42730550784. Its totient is φ = 3816568000.

The previous prime is 15768781043. The next prime is 15768781051. The reversal of 15768781050 is 5018786751.

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 47 ways as a sum of consecutive naturals, for example, 1060165 + ... + 1074935.

It is an arithmetic number, because the mean of its divisors is an integer number (445109904).

Almost surely, 2^15768781050 is an apocalyptic number.

15768781050 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 15768781050, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21365275392).

15768781050 is an abundant number, since it is smaller than the sum of its proper divisors (26961769734).

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

15768781050 is a wasteful number, since it uses less digits than its factorization.

15768781050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15444 (or 15439 counting only the distinct ones).

The product of its (nonzero) digits is 470400, while the sum is 48.

The spelling of 15768781050 in words is "fifteen billion, seven hundred sixty-eight million, seven hundred eighty-one thousand, fifty".