261575641532 has 48 divisors (see below), whose sum is σ = 498892413600. Its totient is φ = 119529204480.

The previous prime is 261575641519. The next prime is 261575641559. The reversal of 261575641532 is 235146575162.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 2552678 + ... + 2653170.

It is an arithmetic number, because the mean of its divisors is an integer number (10393591950).

Almost surely, 2^261575641532 is an apocalyptic number.

It is an amenable number.

261575641532 is a deficient number, since it is larger than the sum of its proper divisors (237316772068).

261575641532 is a wasteful number, since it uses less digits than its factorization.

261575641532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101726 (or 101724 counting only the distinct ones).

The product of its digits is 1512000, while the sum is 47.

The spelling of 261575641532 in words is "two hundred sixty-one billion, five hundred seventy-five million, six hundred forty-one thousand, five hundred thirty-two".