671416545 has 8 divisors (see below), whose sum is σ = 1074266496. Its totient is φ = 358088816.

The previous prime is 671416511. The next prime is 671416549. The reversal of 671416545 is 545614176.

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 671416545 - 2⁶ = 671416481 is a prime.

It is not an unprimeable number, because it can be changed into a prime (671416549) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22380537 + ... + 22380566.

It is an arithmetic number, because the mean of its divisors is an integer number (134283312).

Almost surely, 2^671416545 is an apocalyptic number.

It is an amenable number.

671416545 is a deficient number, since it is larger than the sum of its proper divisors (402849951).

671416545 is a wasteful number, since it uses less digits than its factorization.

671416545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44761111.

The product of its digits is 100800, while the sum is 39.

The square root of 671416545 is about 25911.7067172350. The cubic root of 671416545 is about 875.6502573210.

The spelling of 671416545 in words is "six hundred seventy-one million, four hundred sixteen thousand, five hundred forty-five".