261207451000 has 64 divisors (see below), whose sum is σ = 611393870880. Its totient is φ = 104454188800.

The previous prime is 261207450989. The next prime is 261207451033. The reversal of 261207451000 is 154702162.

It is a self number, because there is not a number n which added to its sum of digits gives 261207451000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3798927 + ... + 3867073.

Almost surely, 2^261207451000 is an apocalyptic number.

261207451000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

261207451000 is an abundant number, since it is smaller than the sum of its proper divisors (350186419880).

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

261207451000 is a wasteful number, since it uses less digits than its factorization.

261207451000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72001 (or 71987 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 28.

The spelling of 261207451000 in words is "two hundred sixty-one billion, two hundred seven million, four hundred fifty-one thousand".