261463264197 has 8 divisors (see below), whose sum is σ = 348624874656. Its totient is φ = 174305248272.

The previous prime is 261463264163. The next prime is 261463264199. The reversal of 261463264197 is 791462364162.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 261463264197 - 2³⁵ = 227103525829 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261463264199) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 724063 + ... + 1023324.

It is an arithmetic number, because the mean of its divisors is an integer number (43578109332).

Almost surely, 2^261463264197 is an apocalyptic number.

It is an amenable number.

261463264197 is a deficient number, since it is larger than the sum of its proper divisors (87161610459).

261463264197 is a wasteful number, since it uses less digits than its factorization.

261463264197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1797267.

The product of its digits is 2612736, while the sum is 51.

The spelling of 261463264197 in words is "two hundred sixty-one billion, four hundred sixty-three million, two hundred sixty-four thousand, one hundred ninety-seven".