261412389989 has 8 divisors (see below), whose sum is σ = 262049758848. Its totient is φ = 260775792000.

The previous prime is 261412389983. The next prime is 261412390013. The reversal of 261412389989 is 989983214162.

261412389989 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-261412389989 is a prime.

It is a super-2 number, since 2×261412389989² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261412389983) 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, 489269 + ... + 873045.

It is an arithmetic number, because the mean of its divisors is an integer number (32756219856).

Almost surely, 2^261412389989 is an apocalyptic number.

It is an amenable number.

261412389989 is a deficient number, since it is larger than the sum of its proper divisors (637368859).

261412389989 is an equidigital number, since it uses as much as digits as its factorization.

261412389989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 385435.

The product of its digits is 13436928, while the sum is 62.

The spelling of 261412389989 in words is "two hundred sixty-one billion, four hundred twelve million, three hundred eighty-nine thousand, nine hundred eighty-nine".