837145645 has 24 divisors (see below), whose sum is σ = 1171638648. Its totient is φ = 572544000.

The previous prime is 837145619. The next prime is 837145649. The reversal of 837145645 is 546541738.

It can be written as a sum of positive squares in 4 ways, for example, as 311910921 + 525234724 = 17661^2 + 22918^2 .

It is not a de Polignac number, because 837145645 - 2⁵ = 837145613 is a prime.

It is a super-3 number, since 3×837145645³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (837145649) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 93985 + ... + 102505.

It is an arithmetic number, because the mean of its divisors is an integer number (48818277).

Almost surely, 2^837145645 is an apocalyptic number.

It is an amenable number.

837145645 is a deficient number, since it is larger than the sum of its proper divisors (334493003).

837145645 is a wasteful number, since it uses less digits than its factorization.

837145645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8941 (or 8934 counting only the distinct ones).

The product of its digits is 403200, while the sum is 43.

The square root of 837145645 is about 28933.4692873150. The cubic root of 837145645 is about 942.4688551977.

The spelling of 837145645 in words is "eight hundred thirty-seven million, one hundred forty-five thousand, six hundred forty-five".