855643015145 has 16 divisors (see below), whose sum is σ = 1049090600448. Its totient is φ = 669648223680.

The previous prime is 855643015141. The next prime is 855643015163. The reversal of 855643015145 is 541510346558.

855643015145 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 855643015145 - 2² = 855643015141 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 855643015145.

It is not an unprimeable number, because it can be changed into a prime (855643015141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 297749 + ... + 1341618.

It is an arithmetic number, because the mean of its divisors is an integer number (65568162528).

Almost surely, 2^855643015145 is an apocalyptic number.

It is an amenable number.

855643015145 is a deficient number, since it is larger than the sum of its proper divisors (193447585303).

855643015145 is a wasteful number, since it uses less digits than its factorization.

855643015145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1641640.

The product of its (nonzero) digits is 1440000, while the sum is 47.

The spelling of 855643015145 in words is "eight hundred fifty-five billion, six hundred forty-three million, fifteen thousand, one hundred forty-five".