261374273000 has 32 divisors (see below), whose sum is σ = 611615801160. Its totient is φ = 104549708800.

The previous prime is 261374272997. The next prime is 261374273009. The reversal of 261374273000 is 372473162.

It can be written as a sum of positive squares in 4 ways, for example, as 78298113124 + 183076159876 = 279818^2 + 427874^2 .

It is not an unprimeable number, because it can be changed into a prime (261374273009) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 130686137 + ... + 130688136.

Almost surely, 2^261374273000 is an apocalyptic number.

261374273000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

261374273000 is an abundant number, since it is smaller than the sum of its proper divisors (350241528160).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

261374273000 is a wasteful number, since it uses less digits than its factorization.

261374273000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261374294 (or 261374280 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 35.

The spelling of 261374273000 in words is "two hundred sixty-one billion, three hundred seventy-four million, two hundred seventy-three thousand".