845390045 has 6 divisors (see below), whose sum is σ = 1014546078. Its totient is φ = 676260024.

The previous prime is 845390011. The next prime is 845390087. The reversal of 845390045 is 540093548.

It is a happy number.

845390045 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 676312036 + 169078009 = 26006^2 + 13003^2 .

It is not a de Polignac number, because 845390045 - 2¹⁸ = 845127901 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 845389990 and 845390008.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 58514 + ... + 71516.

It is an arithmetic number, because the mean of its divisors is an integer number (169091013).

Almost surely, 2^845390045 is an apocalyptic number.

It is an amenable number.

845390045 is a deficient number, since it is larger than the sum of its proper divisors (169156033).

845390045 is an frugal number, since it uses more digits than its factorization.

845390045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26011 (or 13008 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 38.

The square root of 845390045 is about 29075.5919114298. The cubic root of 845390045 is about 945.5526362654.

The spelling of 845390045 in words is "eight hundred forty-five million, three hundred ninety thousand, forty-five".