261562730373 has 48 divisors (see below), whose sum is σ = 437931336960. Its totient is φ = 147339378432.

The previous prime is 261562730369. The next prime is 261562730447. The reversal of 261562730373 is 373037265162.

261562730373 is a `hidden beast` number, since 2 + 6 + 1 + 5 + 6 + 273 + 0 + 373 = 666.

It is not a de Polignac number, because 261562730373 - 2² = 261562730369 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261562730773) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9363415 + ... + 9391307.

It is an arithmetic number, because the mean of its divisors is an integer number (9123569520).

Almost surely, 2^261562730373 is an apocalyptic number.

It is an amenable number.

261562730373 is a deficient number, since it is larger than the sum of its proper divisors (176368606587).

261562730373 is a wasteful number, since it uses less digits than its factorization.

261562730373 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30018 (or 30015 counting only the distinct ones).

The product of its (nonzero) digits is 952560, while the sum is 45.

The spelling of 261562730373 in words is "two hundred sixty-one billion, five hundred sixty-two million, seven hundred thirty thousand, three hundred seventy-three".