261600777318162 has 32 divisors (see below), whose sum is σ = 525967740140544. Its totient is φ = 86739274908800.

The previous prime is 261600777318151. The next prime is 261600777318173. The reversal of 261600777318162 is 261813777006162.

It is an interprime number because it is at equal distance from previous prime (261600777318151) and next prime (261600777318173).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16605112 + ... + 28265372.

It is an arithmetic number, because the mean of its divisors is an integer number (16436491879392).

Almost surely, 2^{261600777318162} is an apocalyptic number.

261600777318162 is an abundant number, since it is smaller than the sum of its proper divisors (264366962822382).

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

261600777318162 is a wasteful number, since it uses less digits than its factorization.

261600777318162 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11680034.

The product of its (nonzero) digits is 7112448, while the sum is 57.

The spelling of 261600777318162 in words is "two hundred sixty-one trillion, six hundred billion, seven hundred seventy-seven million, three hundred eighteen thousand, one hundred sixty-two".