1645195516131 has 8 divisors (see below), whose sum is σ = 2264355119104. Its totient is φ = 1061416461960.

The previous prime is 1645195516079. The next prime is 1645195516141. The reversal of 1645195516131 is 1316155915461.

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

It is not a de Polignac number, because 1645195516131 - 2¹⁴ = 1645195499747 is a prime.

It is a super-2 number, since 2×1645195516131² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1645195516141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8845137091 + ... + 8845137276.

It is an arithmetic number, because the mean of its divisors is an integer number (283044389888).

Almost surely, 2^{1645195516131} is an apocalyptic number.

1645195516131 is a deficient number, since it is larger than the sum of its proper divisors (619159602973).

1645195516131 is a wasteful number, since it uses less digits than its factorization.

1645195516131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17690274401.

The product of its digits is 486000, while the sum is 48.

The spelling of 1645195516131 in words is "one trillion, six hundred forty-five billion, one hundred ninety-five million, five hundred sixteen thousand, one hundred thirty-one".