261624056452 has 48 divisors (see below), whose sum is σ = 533354411520. Its totient is φ = 111115468800.

The previous prime is 261624056431. The next prime is 261624056467. The reversal of 261624056452 is 254650426162.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 261624056399 and 261624056408.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3267453 + ... + 3346564.

It is an arithmetic number, because the mean of its divisors is an integer number (11111550240).

Almost surely, 2^261624056452 is an apocalyptic number.

261624056452 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

261624056452 is an abundant number, since it is smaller than the sum of its proper divisors (271730355068).

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

261624056452 is a wasteful number, since it uses less digits than its factorization.

261624056452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6614092 (or 6614090 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 43.

The spelling of 261624056452 in words is "two hundred sixty-one billion, six hundred twenty-four million, fifty-six thousand, four hundred fifty-two".