645106041131 has 8 divisors (see below), whose sum is σ = 655695730704. Its totient is φ = 634516809120.

The previous prime is 645106041079. The next prime is 645106041143. The reversal of 645106041131 is 131140601546.

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

It is a cyclic number.

It is not a de Polignac number, because 645106041131 - 2³⁴ = 627926171947 is a prime.

It is a super-2 number, since 2×645106041131² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (645106001131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3842120 + ... + 4006506.

It is an arithmetic number, because the mean of its divisors is an integer number (81961966338).

Almost surely, 2^645106041131 is an apocalyptic number.

645106041131 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

645106041131 is a deficient number, since it is larger than the sum of its proper divisors (10589689573).

645106041131 is a wasteful number, since it uses less digits than its factorization.

645106041131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228781.

The product of its (nonzero) digits is 8640, while the sum is 32.

Adding to 645106041131 its reverse (131140601546), we get a palindrome (776246642677).

The spelling of 645106041131 in words is "six hundred forty-five billion, one hundred six million, forty-one thousand, one hundred thirty-one".