261070387199 has 4 divisors (see below), whose sum is σ = 261071695920. Its totient is φ = 261069078480.

The previous prime is 261070387187. The next prime is 261070387247. The reversal of 261070387199 is 991783070162.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 261070387199 - 2⁸ = 261070386943 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 261070387199.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261070387169) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 286019 + ... + 777140.

It is an arithmetic number, because the mean of its divisors is an integer number (65267923980).

Almost surely, 2^261070387199 is an apocalyptic number.

261070387199 is a deficient number, since it is larger than the sum of its proper divisors (1308721).

261070387199 is a wasteful number, since it uses less digits than its factorization.

261070387199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1308720.

The product of its (nonzero) digits is 1143072, while the sum is 53.

The spelling of 261070387199 in words is "two hundred sixty-one billion, seventy million, three hundred eighty-seven thousand, one hundred ninety-nine".