1980454159 has 4 divisors (see below), whose sum is σ = 1997980416. Its totient is φ = 1962927904.

The previous prime is 1980454153. The next prime is 1980454187. The reversal of 1980454159 is 9514540891.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9514540891 = 67 ⋅142008073.

It is a cyclic number.

It is not a de Polignac number, because 1980454159 - 2¹³ = 1980445967 is a prime.

It is a super-3 number, since 3×1980454159³ (a number of 29 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1980454153) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8762959 + ... + 8763184.

It is an arithmetic number, because the mean of its divisors is an integer number (499495104).

Almost surely, 2^1980454159 is an apocalyptic number.

1980454159 is a deficient number, since it is larger than the sum of its proper divisors (17526257).

1980454159 is a wasteful number, since it uses less digits than its factorization.

1980454159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17526256.

The product of its (nonzero) digits is 259200, while the sum is 46.

The square root of 1980454159 is about 44502.2938622269. The cubic root of 1980454159 is about 1255.8032368467.

The spelling of 1980454159 in words is "one billion, nine hundred eighty million, four hundred fifty-four thousand, one hundred fifty-nine".