2145556365 has 8 divisors (see below), whose sum is σ = 3432890208. Its totient is φ = 1144296720.

The previous prime is 2145556321. The next prime is 2145556373. The reversal of 2145556365 is 5636555412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2145556365 - 2²² = 2141362061 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71518531 + ... + 71518560.

It is an arithmetic number, because the mean of its divisors is an integer number (429111276).

Almost surely, 2^2145556365 is an apocalyptic number.

It is an amenable number.

2145556365 is a deficient number, since it is larger than the sum of its proper divisors (1287333843).

2145556365 is a wasteful number, since it uses less digits than its factorization.

2145556365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143037099.

The product of its digits is 540000, while the sum is 42.

The square root of 2145556365 is about 46320.1507445734. The cubic root of 2145556365 is about 1289.7730836972.

The spelling of 2145556365 in words is "two billion, one hundred forty-five million, five hundred fifty-six thousand, three hundred sixty-five".