261446089968 has 60 divisors (see below), whose sum is σ = 836212497328. Its totient is φ = 74698882560.

The previous prime is 261446089901. The next prime is 261446089979. The reversal of 261446089968 is 869980644162.

261446089968 is a `hidden beast` number, since 2 + 6 + 1 + 4 + 460 + 89 + 96 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 129684553 + ... + 129686568.

Almost surely, 2^261446089968 is an apocalyptic number.

261446089968 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

261446089968 is an abundant number, since it is smaller than the sum of its proper divisors (574766407360).

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

261446089968 is a wasteful number, since it uses less digits than its factorization.

261446089968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259371142 (or 259371133 counting only the distinct ones).

The product of its (nonzero) digits is 35831808, while the sum is 63.

The spelling of 261446089968 in words is "two hundred sixty-one billion, four hundred forty-six million, eighty-nine thousand, nine hundred sixty-eight".