845157851 has 4 divisors (see below), whose sum is σ = 845279304. Its totient is φ = 845036400.

The previous prime is 845157787. The next prime is 845157853. The reversal of 845157851 is 158751548.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 845157851 - 2⁶ = 845157787 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (845157853) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49610 + ... + 64431.

It is an arithmetic number, because the mean of its divisors is an integer number (211319826).

Almost surely, 2^845157851 is an apocalyptic number.

845157851 is a deficient number, since it is larger than the sum of its proper divisors (121453).

845157851 is a wasteful number, since it uses less digits than its factorization.

845157851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121452.

The product of its digits is 224000, while the sum is 44.

The square root of 845157851 is about 29071.5987004499. The cubic root of 845157851 is about 945.4660601523.

The spelling of 845157851 in words is "eight hundred forty-five million, one hundred fifty-seven thousand, eight hundred fifty-one".