261660316354 has 16 divisors (see below), whose sum is σ = 403749604800. Its totient is φ = 127088540784.

The previous prime is 261660316303. The next prime is 261660316427. The reversal of 261660316354 is 453613066162.

261660316354 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×261660316354² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 261660316354.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 2810374 + ... + 2901985.

It is an arithmetic number, because the mean of its divisors is an integer number (25234350300).

Almost surely, 2^261660316354 is an apocalyptic number.

261660316354 is a deficient number, since it is larger than the sum of its proper divisors (142089288446).

261660316354 is a wasteful number, since it uses less digits than its factorization.

261660316354 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5713017.

The product of its (nonzero) digits is 466560, while the sum is 43.

The spelling of 261660316354 in words is "two hundred sixty-one billion, six hundred sixty million, three hundred sixteen thousand, three hundred fifty-four".