261207010015 has 16 divisors (see below), whose sum is σ = 358574261760. Its totient is φ = 178939625760.

The previous prime is 261207009883. The next prime is 261207010039. The reversal of 261207010015 is 510010702162.

It is not a de Polignac number, because 261207010015 - 2³¹ = 259059526367 is a prime.

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, 3583245 + ... + 3655414.

It is an arithmetic number, because the mean of its divisors is an integer number (22410891360).

Almost surely, 2^261207010015 is an apocalyptic number.

261207010015 is a deficient number, since it is larger than the sum of its proper divisors (97367251745).

261207010015 is a wasteful number, since it uses less digits than its factorization.

261207010015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7239702.

The product of its (nonzero) digits is 840, while the sum is 25.

Adding to 261207010015 its reverse (510010702162), we get a palindrome (771217712177).

The spelling of 261207010015 in words is "two hundred sixty-one billion, two hundred seven million, ten thousand, fifteen".