1597785945 has 16 divisors (see below), whose sum is σ = 2921665920. Its totient is φ = 730416384.

The previous prime is 1597785929. The next prime is 1597785947. The reversal of 1597785945 is 5495877951.

It is not a de Polignac number, because 1597785945 - 2⁴ = 1597785929 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1597785947) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7608400 + ... + 7608609.

It is an arithmetic number, because the mean of its divisors is an integer number (182604120).

Almost surely, 2^1597785945 is an apocalyptic number.

1597785945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1597785945 is a deficient number, since it is larger than the sum of its proper divisors (1323879975).

1597785945 is a wasteful number, since it uses less digits than its factorization.

1597785945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15217024.

The product of its digits is 15876000, while the sum is 60.

The square root of 1597785945 is about 39972.3147315739. The cubic root of 1597785945 is about 1169.0673515711.

The spelling of 1597785945 in words is "one billion, five hundred ninety-seven million, seven hundred eighty-five thousand, nine hundred forty-five".