1591678945 has 8 divisors (see below), whose sum is σ = 1910603520. Its totient is φ = 1272950640.

The previous prime is 1591678939. The next prime is 1591678961. The reversal of 1591678945 is 5498761951.

It is a happy number.

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

It is not a de Polignac number, because 1591678945 - 2⁷ = 1591678817 is a prime.

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, 30591 + ... + 64180.

It is an arithmetic number, because the mean of its divisors is an integer number (238825440).

Almost surely, 2^1591678945 is an apocalyptic number.

It is an amenable number.

1591678945 is a deficient number, since it is larger than the sum of its proper divisors (318924575).

1591678945 is an equidigital number, since it uses as much as digits as its factorization.

1591678945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98135.

The product of its digits is 2721600, while the sum is 55.

The square root of 1591678945 is about 39895.8512254094. The cubic root of 1591678945 is about 1167.5759941485.

The spelling of 1591678945 in words is "one billion, five hundred ninety-one million, six hundred seventy-eight thousand, nine hundred forty-five".