169012861540 has 12 divisors (see below), whose sum is σ = 354927009276. Its totient is φ = 67605144608.

The previous prime is 169012861531. The next prime is 169012861553. The reversal of 169012861540 is 45168210961.

It can be written as a sum of positive squares in 2 ways, for example, as 79798340196 + 89214521344 = 282486^2 + 298688^2 .

It is a super-2 number, since 2×169012861540² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4225321519 + ... + 4225321558.

It is an arithmetic number, because the mean of its divisors is an integer number (29577250773).

Almost surely, 2^169012861540 is an apocalyptic number.

169012861540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

169012861540 is an abundant number, since it is smaller than the sum of its proper divisors (185914147736).

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

169012861540 is a wasteful number, since it uses less digits than its factorization.

169012861540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8450643086 (or 8450643084 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 43.

The spelling of 169012861540 in words is "one hundred sixty-nine billion, twelve million, eight hundred sixty-one thousand, five hundred forty".