261316454 has 8 divisors (see below), whose sum is σ = 447971088. Its totient is φ = 111992760.

The previous prime is 261316441. The next prime is 261316463. The reversal of 261316454 is 454613162.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×261316454² = 136572578262268232, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 261316454.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9332717 + ... + 9332744.

It is an arithmetic number, because the mean of its divisors is an integer number (55996386).

Almost surely, 2^261316454 is an apocalyptic number.

261316454 is a deficient number, since it is larger than the sum of its proper divisors (186654634).

261316454 is a wasteful number, since it uses less digits than its factorization.

261316454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18665470.

The product of its digits is 17280, while the sum is 32.

The square root of 261316454 is about 16165.2854598983. The cubic root of 261316454 is about 639.3258314292.

The spelling of 261316454 in words is "two hundred sixty-one million, three hundred sixteen thousand, four hundred fifty-four".