8561501466 has 32 divisors (see below), whose sum is σ = 19837223808. Its totient is φ = 2412633600.

The previous prime is 8561501411. The next prime is 8561501471. The reversal of 8561501466 is 6641051658.

It is a Harshad number since it is a multiple of its sum of digits (42).

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, 1393135 + ... + 1399266.

It is an arithmetic number, because the mean of its divisors is an integer number (619913244).

Almost surely, 2^8561501466 is an apocalyptic number.

8561501466 is an abundant number, since it is smaller than the sum of its proper divisors (11275722342).

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

8561501466 is a wasteful number, since it uses less digits than its factorization.

8561501466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2792486.

The product of its (nonzero) digits is 172800, while the sum is 42.

The square root of 8561501466 is about 92528.3819484595. The cubic root of 8561501466 is about 2045.7378403726.

The spelling of 8561501466 in words is "eight billion, five hundred sixty-one million, five hundred one thousand, four hundred sixty-six".