159169556450 has 24 divisors (see below), whose sum is σ = 296240905812. Its totient is φ = 63627923520.

The previous prime is 159169556353. The next prime is 159169556453. The reversal of 159169556450 is 54655961951.

It can be written as a sum of positive squares in 6 ways, for example, as 63540797329 + 95628759121 = 252073^2 + 309239^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (159169556453) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 916829 + ... + 1076528.

Almost surely, 2^159169556450 is an apocalyptic number.

159169556450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

159169556450 is a deficient number, since it is larger than the sum of its proper divisors (137071349362).

159169556450 is a wasteful number, since it uses less digits than its factorization.

159169556450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1994966 (or 1994961 counting only the distinct ones).

The product of its (nonzero) digits is 7290000, while the sum is 56.

The spelling of 159169556450 in words is "one hundred fifty-nine billion, one hundred sixty-nine million, five hundred fifty-six thousand, four hundred fifty".