261245463016 has 32 divisors (see below), whose sum is σ = 511171871040. Its totient is φ = 124933840768.

The previous prime is 261245463013. The next prime is 261245463041. The reversal of 261245463016 is 610364542162.

It is a self number, because there is not a number n which added to its sum of digits gives 261245463016.

It is not an unprimeable number, because it can be changed into a prime (261245463013) 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, 2715855 + ... + 2810401.

It is an arithmetic number, because the mean of its divisors is an integer number (15974120970).

Almost surely, 2^261245463016 is an apocalyptic number.

It is an amenable number.

261245463016 is a deficient number, since it is larger than the sum of its proper divisors (249926408024).

261245463016 is a wasteful number, since it uses less digits than its factorization.

261245463016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109593 (or 109589 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 40.

The spelling of 261245463016 in words is "two hundred sixty-one billion, two hundred forty-five million, four hundred sixty-three thousand, sixteen".