261022404646344 has 128 divisors (see below), whose sum is σ = 749353194777600. Its totient is φ = 74934003767040.

The previous prime is 261022404646343. The next prime is 261022404646351. The reversal of 261022404646344 is 443646404220162.

It is a junction number, because it is equal to n+sod(n) for n = 261022404646293 and 261022404646302.

It is not an unprimeable number, because it can be changed into a prime (261022404646343) 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 31 ways as a sum of consecutive naturals, for example, 1086581254 + ... + 1086821450.

It is an arithmetic number, because the mean of its divisors is an integer number (5854321834200).

Almost surely, 2^{261022404646344} is an apocalyptic number.

261022404646344 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

261022404646344 is an abundant number, since it is smaller than the sum of its proper divisors (488330790131256).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

261022404646344 is a wasteful number, since it uses less digits than its factorization.

261022404646344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 456883 (or 456879 counting only the distinct ones).

The product of its (nonzero) digits is 5308416, while the sum is 48.

The spelling of 261022404646344 in words is "two hundred sixty-one trillion, twenty-two billion, four hundred four million, six hundred forty-six thousand, three hundred forty-four".