1535481566 has 4 divisors (see below), whose sum is σ = 2303222352. Its totient is φ = 767740782.

The previous prime is 1535481557. The next prime is 1535481581. The reversal of 1535481566 is 6651845351.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 383870390 + ... + 383870393.

It is an arithmetic number, because the mean of its divisors is an integer number (575805588).

Almost surely, 2^1535481566 is an apocalyptic number.

1535481566 is a deficient number, since it is larger than the sum of its proper divisors (767740786).

1535481566 is an equidigital number, since it uses as much as digits as its factorization.

1535481566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 767740785.

The product of its digits is 432000, while the sum is 44.

The square root of 1535481566 is about 39185.2212702697. The cubic root of 1535481566 is about 1153.6698306639.

The spelling of 1535481566 in words is "one billion, five hundred thirty-five million, four hundred eighty-one thousand, five hundred sixty-six".