1601997534 has 32 divisors (see below), whose sum is σ = 3563477280. Its totient is φ = 533476800.

The previous prime is 1601997511. The next prime is 1601997563. The reversal of 1601997534 is 4357991061.

1601997534 is a `hidden beast` number, since 1 + 601 + 9 + 9 + 7 + 5 + 34 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 1601997534.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43314 + ... + 71274.

It is an arithmetic number, because the mean of its divisors is an integer number (111358665).

Almost surely, 2^1601997534 is an apocalyptic number.

1601997534 is an abundant number, since it is smaller than the sum of its proper divisors (1961479746).

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

1601997534 is a wasteful number, since it uses less digits than its factorization.

1601997534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29033 (or 29027 counting only the distinct ones).

The product of its (nonzero) digits is 204120, while the sum is 45.

The square root of 1601997534 is about 40024.9613866147. The cubic root of 1601997534 is about 1170.0936282732.

The spelling of 1601997534 in words is "one billion, six hundred one million, nine hundred ninety-seven thousand, five hundred thirty-four".