671605494 has 64 divisors (see below), whose sum is σ = 1556236800. Its totient is φ = 189266688.

The previous prime is 671605489. The next prime is 671605499. The reversal of 671605494 is 494506176.

671605494 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (671605489) and next prime (671605499).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671605499) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1180042 + ... + 1180610.

It is an arithmetic number, because the mean of its divisors is an integer number (24316200).

Almost surely, 2^671605494 is an apocalyptic number.

671605494 is an abundant number, since it is smaller than the sum of its proper divisors (884631306).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

671605494 is a wasteful number, since it uses less digits than its factorization.

671605494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 917.

The product of its (nonzero) digits is 181440, while the sum is 42.

The square root of 671605494 is about 25915.3524768621. The cubic root of 671605494 is about 875.7323909948.

The spelling of 671605494 in words is "six hundred seventy-one million, six hundred five thousand, four hundred ninety-four".