1853170945945 has 16 divisors (see below), whose sum is σ = 2448641855808. Its totient is φ = 1335164789440.

The previous prime is 1853170945939. The next prime is 1853170945973. The reversal of 1853170945945 is 5495490713581.

It is a de Polignac number, because none of the positive numbers 2^k-1853170945945 is a prime.

It is a super-2 number, since 2×1853170945945² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

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, 157442794 + ... + 157454563.

It is an arithmetic number, because the mean of its divisors is an integer number (153040115988).

Almost surely, 2^{1853170945945} is an apocalyptic number.

It is an amenable number.

1853170945945 is a deficient number, since it is larger than the sum of its proper divisors (595470909863).

1853170945945 is a wasteful number, since it uses less digits than its factorization.

1853170945945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314897480.

The product of its (nonzero) digits is 27216000, while the sum is 61.

The spelling of 1853170945945 in words is "one trillion, eight hundred fifty-three billion, one hundred seventy million, nine hundred forty-five thousand, nine hundred forty-five".