261646126567372 has 12 divisors (see below), whose sum is σ = 457880834837776. Its totient is φ = 130823030899440.

The previous prime is 261646126567367. The next prime is 261646126567403. The reversal of 261646126567372 is 273765621646162.

It is a hoax number, since the sum of its digits (64) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26684722 + ... + 35147782.

Almost surely, 2^{261646126567372} is an apocalyptic number.

It is an amenable number.

261646126567372 is a deficient number, since it is larger than the sum of its proper divisors (196234708270404).

261646126567372 is a wasteful number, since it uses less digits than its factorization.

261646126567372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16192128 (or 16192126 counting only the distinct ones).

The product of its digits is 182891520, while the sum is 64.

The spelling of 261646126567372 in words is "two hundred sixty-one trillion, six hundred forty-six billion, one hundred twenty-six million, five hundred sixty-seven thousand, three hundred seventy-two".