1597883661 has 48 divisors (see below), whose sum is σ = 2565164160. Its totient is φ = 950400000.

The previous prime is 1597883657. The next prime is 1597883663. The reversal of 1597883661 is 1663887951.

It is not a de Polignac number, because 1597883661 - 2² = 1597883657 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1597883598 and 1597883607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1597883663) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1329861 + ... + 1331061.

It is an arithmetic number, because the mean of its divisors is an integer number (53440920).

Almost surely, 2^1597883661 is an apocalyptic number.

1597883661 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1597883661 is a deficient number, since it is larger than the sum of its proper divisors (967280499).

1597883661 is a wasteful number, since it uses less digits than its factorization.

1597883661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1458 (or 1455 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 54.

The square root of 1597883661 is about 39973.5370088763. The cubic root of 1597883661 is about 1169.0911833526.

The spelling of 1597883661 in words is "one billion, five hundred ninety-seven million, eight hundred eighty-three thousand, six hundred sixty-one".