881819145 has 12 divisors (see below), whose sum is σ = 1528486596. Its totient is φ = 470303520.

The previous prime is 881819129. The next prime is 881819161. The reversal of 881819145 is 541918188.

It is an interprime number because it is at equal distance from previous prime (881819129) and next prime (881819161).

It can be written as a sum of positive squares in 2 ways, for example, as 368524809 + 513294336 = 19197^2 + 22656^2 .

It is not a de Polignac number, because 881819145 - 2⁴ = 881819129 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 19595981 = 881819145 / (8 + 8 + 1 + 8 + 1 + 9 + 1 + 4 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 881819145.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9797946 + ... + 9798035.

It is an arithmetic number, because the mean of its divisors is an integer number (127373883).

Almost surely, 2^881819145 is an apocalyptic number.

It is an amenable number.

881819145 is a deficient number, since it is larger than the sum of its proper divisors (646667451).

881819145 is a wasteful number, since it uses less digits than its factorization.

881819145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19595992 (or 19595989 counting only the distinct ones).

The product of its digits is 92160, while the sum is 45.

The square root of 881819145 is about 29695.4398014241. The cubic root of 881819145 is about 958.9438417331.

The spelling of 881819145 in words is "eight hundred eighty-one million, eight hundred nineteen thousand, one hundred forty-five".