261225634454 has 8 divisors (see below), whose sum is σ = 391891190040. Its totient is φ = 130595237776.

The previous prime is 261225634433. The next prime is 261225634459. The reversal of 261225634454 is 454436522162.

It is a happy number.

261225634454 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261225634459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8771144 + ... + 8800875.

It is an arithmetic number, because the mean of its divisors is an integer number (48986398755).

Almost surely, 2^261225634454 is an apocalyptic number.

261225634454 is a deficient number, since it is larger than the sum of its proper divisors (130665555586).

261225634454 is a wasteful number, since it uses less digits than its factorization.

261225634454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17579454.

The product of its digits is 1382400, while the sum is 44.

The spelling of 261225634454 in words is "two hundred sixty-one billion, two hundred twenty-five million, six hundred thirty-four thousand, four hundred fifty-four".