901167561 has 12 divisors (see below), whose sum is σ = 1487641792. Its totient is φ = 514952856.

The previous prime is 901167541. The next prime is 901167643. The reversal of 901167561 is 165761109.

It is a happy number.

901167561 is a `hidden beast` number, since 90 + 1 + 1 + 6 + 7 + 561 = 666.

It is not a de Polignac number, because 901167561 - 2⁵ = 901167529 is a prime.

It is not an unprimeable number, because it can be changed into a prime (901167521) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7152061 + ... + 7152186.

Almost surely, 2^901167561 is an apocalyptic number.

It is an amenable number.

901167561 is a deficient number, since it is larger than the sum of its proper divisors (586474231).

901167561 is a wasteful number, since it uses less digits than its factorization.

901167561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14304260 (or 14304257 counting only the distinct ones).

The product of its (nonzero) digits is 11340, while the sum is 36.

The square root of 901167561 is about 30019.4530429853. The cubic root of 901167561 is about 965.9067107679.

The spelling of 901167561 in words is "nine hundred one million, one hundred sixty-seven thousand, five hundred sixty-one".