261430536335712 has 48 divisors (see below), whose sum is σ = 702214580168640. Its totient is φ = 85116918805632.

The previous prime is 261430536335699. The next prime is 261430536335713. The reversal of 261430536335712 is 217533635034162.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261430536335713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31665516262 + ... + 31665524517.

It is an arithmetic number, because the mean of its divisors is an integer number (14629470420180).

Almost surely, 2^{261430536335712} is an apocalyptic number.

It is an amenable number.

261430536335712 is an abundant number, since it is smaller than the sum of its proper divisors (440784043832928).

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

261430536335712 is a wasteful number, since it uses less digits than its factorization.

261430536335712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63331040835 (or 63331040827 counting only the distinct ones).

The product of its (nonzero) digits is 8164800, while the sum is 51.

The spelling of 261430536335712 in words is "two hundred sixty-one trillion, four hundred thirty billion, five hundred thirty-six million, three hundred thirty-five thousand, seven hundred twelve".