123085261919 has 16 divisors (see below), whose sum is σ = 129594517920. Its totient is φ = 116787264000.

The previous prime is 123085261913. The next prime is 123085261961. The reversal of 123085261919 is 919162580321.

It is a cyclic number.

It is not a de Polignac number, because 123085261919 - 2¹⁶ = 123085196383 is a prime.

It is a super-2 number, since 2×123085261919² (a number of 23 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 (123085261913) 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, 53897 + ... + 499074.

It is an arithmetic number, because the mean of its divisors is an integer number (8099657370).

Almost surely, 2^123085261919 is an apocalyptic number.

123085261919 is a deficient number, since it is larger than the sum of its proper divisors (6509256001).

123085261919 is an equidigital number, since it uses as much as digits as its factorization.

123085261919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 553162.

The product of its (nonzero) digits is 233280, while the sum is 47.

The spelling of 123085261919 in words is "one hundred twenty-three billion, eighty-five million, two hundred sixty-one thousand, nine hundred nineteen".