158085421965 has 12 divisors (see below), whose sum is σ = 274014731484. Its totient is φ = 84312225024.

The previous prime is 158085421961. The next prime is 158085421979. The reversal of 158085421965 is 569124580851.

158085421965 is a `hidden beast` number, since 1 + 5 + 8 + 0 + 8 + 542 + 1 + 96 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 121306620681 + 36778801284 = 348291^2 + 191778^2 .

It is not a de Polignac number, because 158085421965 - 2² = 158085421961 is a prime.

It is a super-2 number, since 2×158085421965² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (158085421961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1756504644 + ... + 1756504733.

It is an arithmetic number, because the mean of its divisors is an integer number (22834560957).

Almost surely, 2^158085421965 is an apocalyptic number.

158085421965 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

158085421965 is a deficient number, since it is larger than the sum of its proper divisors (115929309519).

158085421965 is a wasteful number, since it uses less digits than its factorization.

158085421965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3513009388 (or 3513009385 counting only the distinct ones).

The product of its (nonzero) digits is 3456000, while the sum is 54.

The spelling of 158085421965 in words is "one hundred fifty-eight billion, eighty-five million, four hundred twenty-one thousand, nine hundred sixty-five".