261343251454 has 8 divisors (see below), whose sum is σ = 392192829720. Its totient is φ = 130612308216.

The previous prime is 261343251451. The next prime is 261343251479. The reversal of 261343251454 is 454152343162.

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

It is a super-2 number, since 2×261343251454² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261343251451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29653249 + ... + 29662060.

It is an arithmetic number, because the mean of its divisors is an integer number (49024103715).

Almost surely, 2^261343251454 is an apocalyptic number.

261343251454 is a deficient number, since it is larger than the sum of its proper divisors (130849578266).

261343251454 is a wasteful number, since it uses less digits than its factorization.

261343251454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59317514.

The product of its digits is 345600, while the sum is 40.

The spelling of 261343251454 in words is "two hundred sixty-one billion, three hundred forty-three million, two hundred fifty-one thousand, four hundred fifty-four".