261552373057126 has 8 divisors (see below), whose sum is σ = 402932034169200. Its totient is φ = 127241695000728.

The previous prime is 261552373057103. The next prime is 261552373057133. The reversal of 261552373057126 is 621750373255162.

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

It is a congruent number.

It is an unprimeable number.

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, 1767245763826 + ... + 1767245763973.

It is an arithmetic number, because the mean of its divisors is an integer number (50366504271150).

Almost surely, 2^{261552373057126} is an apocalyptic number.

261552373057126 is a deficient number, since it is larger than the sum of its proper divisors (141379661112074).

261552373057126 is a wasteful number, since it uses less digits than its factorization.

261552373057126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3534491527838.

The product of its (nonzero) digits is 15876000, while the sum is 55.

The spelling of 261552373057126 in words is "two hundred sixty-one trillion, five hundred fifty-two billion, three hundred seventy-three million, fifty-seven thousand, one hundred twenty-six".