1881612465 has 16 divisors (see below), whose sum is σ = 3169032000. Its totient is φ = 950709312.

The previous prime is 1881612443. The next prime is 1881612493. The reversal of 1881612465 is 5642161881.

It is not a de Polignac number, because 1881612465 - 2⁶ = 1881612401 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3300790 + ... + 3301359.

It is an arithmetic number, because the mean of its divisors is an integer number (198064500).

Almost surely, 2^1881612465 is an apocalyptic number.

1881612465 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1881612465 is a deficient number, since it is larger than the sum of its proper divisors (1287419535).

1881612465 is a wasteful number, since it uses less digits than its factorization.

1881612465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6602176.

The product of its digits is 92160, while the sum is 42.

The square root of 1881612465 is about 43377.5571580512. The cubic root of 1881612465 is about 1234.5539134267.

The spelling of 1881612465 in words is "one billion, eight hundred eighty-one million, six hundred twelve thousand, four hundred sixty-five".