261251416454 has 8 divisors (see below), whose sum is σ = 447859571088. Its totient is φ = 111964892760.

The previous prime is 261251416429. The next prime is 261251416463. The reversal of 261251416454 is 454614152162.

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

It is a Curzon number.

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, 9330407717 + ... + 9330407744.

It is an arithmetic number, because the mean of its divisors is an integer number (55982446386).

Almost surely, 2^261251416454 is an apocalyptic number.

261251416454 is a deficient number, since it is larger than the sum of its proper divisors (186608154634).

261251416454 is a wasteful number, since it uses less digits than its factorization.

261251416454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18660815470.

The product of its digits is 230400, while the sum is 41.

The spelling of 261251416454 in words is "two hundred sixty-one billion, two hundred fifty-one million, four hundred sixteen thousand, four hundred fifty-four".