261647002341772 has 12 divisors (see below), whose sum is σ = 458030965472080. Its totient is φ = 130781012206896.

The previous prime is 261647002341727. The next prime is 261647002341827. The reversal of 261647002341772 is 277143200746162.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10622227143 + ... + 10622251774.

Almost surely, 2^{261647002341772} is an apocalyptic number.

It is an amenable number.

261647002341772 is a deficient number, since it is larger than the sum of its proper divisors (196383963130308).

261647002341772 is a wasteful number, since it uses less digits than its factorization.

261647002341772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21244482000 (or 21244481998 counting only the distinct ones).

The product of its (nonzero) digits is 4741632, while the sum is 52.

The spelling of 261647002341772 in words is "two hundred sixty-one trillion, six hundred forty-seven billion, two million, three hundred forty-one thousand, seven hundred seventy-two".