671022545 has 8 divisors (see below), whose sum is σ = 805408296. Its totient is φ = 536697216.

The previous prime is 671022481. The next prime is 671022557. The reversal of 671022545 is 545220176.

It can be written as a sum of positive squares in 4 ways, for example, as 147573904 + 523448641 = 12148^2 + 22879^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 671022545 - 2⁶ = 671022481 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14669 + ... + 39461.

It is an arithmetic number, because the mean of its divisors is an integer number (100676037).

Almost surely, 2^671022545 is an apocalyptic number.

It is an amenable number.

671022545 is a deficient number, since it is larger than the sum of its proper divisors (134385751).

671022545 is a wasteful number, since it uses less digits than its factorization.

671022545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30211.

The product of its (nonzero) digits is 16800, while the sum is 32.

The square root of 671022545 is about 25904.1028603579. The cubic root of 671022545 is about 875.4789410637.

The spelling of 671022545 in words is "six hundred seventy-one million, twenty-two thousand, five hundred forty-five".