12158590756 has 27 divisors (see below), whose sum is σ = 23045603763. Its totient is φ = 5610334080.

The previous prime is 12158590739. The next prime is 12158590793. The reversal of 12158590756 is 65709585121.

The square root of 12158590756 is 110266.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 876752100 + 11281838656 = 29610^2 + 106216^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2864796 + ... + 2869036.

Almost surely, 2^12158590756 is an apocalyptic number.

12158590756 is the 110266-th square number.

It is an amenable number.

12158590756 is a deficient number, since it is larger than the sum of its proper divisors (10887013007).

12158590756 is an frugal number, since it uses more digits than its factorization.

12158590756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8512 (or 4256 counting only the distinct ones).

The product of its (nonzero) digits is 756000, while the sum is 49.

Multiplying 12158590756 by its sum of digits (49), we get a square (595770947044 = 771862²).

The spelling of 12158590756 in words is "twelve billion, one hundred fifty-eight million, five hundred ninety thousand, seven hundred fifty-six".