561612167 has 4 divisors (see below), whose sum is σ = 561667296. Its totient is φ = 561557040.

The previous prime is 561612109. The next prime is 561612179. The reversal of 561612167 is 761216165.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 561612167 - 2¹² = 561608071 is a prime.

It is a super-2 number, since 2×561612167² = 630816452244871778, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561612067) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7334 + ... + 34307.

It is an arithmetic number, because the mean of its divisors is an integer number (140416824).

Almost surely, 2^561612167 is an apocalyptic number.

561612167 is a deficient number, since it is larger than the sum of its proper divisors (55129).

561612167 is a wasteful number, since it uses less digits than its factorization.

561612167 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55128.

The product of its digits is 15120, while the sum is 35.

The square root of 561612167 is about 23698.3578966982. The cubic root of 561612167 is about 825.0472783435.

The spelling of 561612167 in words is "five hundred sixty-one million, six hundred twelve thousand, one hundred sixty-seven".