1652139495981 has 108 divisors (see below), whose sum is σ = 2769124254624. Its totient is φ = 983880911520.

The previous prime is 1652139495953. The next prime is 1652139495989. The reversal of 1652139495981 is 1895949312561.

1652139495981 is a `hidden beast` number, since 1 + 6 + 5 + 2 + 1 + 39 + 4 + 9 + 598 + 1 = 666.

It is not a de Polignac number, because 1652139495981 - 2¹⁵ = 1652139463213 is a prime.

It is a super-2 number, since 2×1652139495981² (a number of 25 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 (1652139495989) by changing a digit.

It is a polite number, since it can be written in 107 ways as a sum of consecutive naturals, for example, 39444456 + ... + 39486318.

Almost surely, 2^{1652139495981} is an apocalyptic number.

It is an amenable number.

1652139495981 is a deficient number, since it is larger than the sum of its proper divisors (1116984758643).

1652139495981 is an equidigital number, since it uses as much as digits as its factorization.

1652139495981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41966 (or 41910 counting only the distinct ones).

The product of its digits is 20995200, while the sum is 63.

The spelling of 1652139495981 in words is "one trillion, six hundred fifty-two billion, one hundred thirty-nine million, four hundred ninety-five thousand, nine hundred eighty-one".