261430545211707 has 16 divisors (see below), whose sum is σ = 356052582438912. Its totient is φ = 170549061829440.

The previous prime is 261430545211631. The next prime is 261430545211733. The reversal of 261430545211707 is 707112545034162.

It is a happy number.

It is not a de Polignac number, because 261430545211707 - 2²⁷ = 261430410993979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (261430545211807) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 160784019 + ... + 162401852.

It is an arithmetic number, because the mean of its divisors is an integer number (22253286402432).

Almost surely, 2^{261430545211707} is an apocalyptic number.

261430545211707 is a deficient number, since it is larger than the sum of its proper divisors (94622037227205).

261430545211707 is a wasteful number, since it uses less digits than its factorization.

261430545211707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323191658.

The product of its (nonzero) digits is 1411200, while the sum is 48.

The spelling of 261430545211707 in words is "two hundred sixty-one trillion, four hundred thirty billion, five hundred forty-five million, two hundred eleven thousand, seven hundred seven".