1645004924531 has 2 divisors, whose sum is σ = 1645004924532. Its totient is φ = 1645004924530.

The previous prime is 1645004924509. The next prime is 1645004924551. The reversal of 1645004924531 is 1354294005461.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1645004924531 is a prime.

It is a super-2 number, since 2×1645004924531² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1645004924551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 822502462265 + 822502462266.

It is an arithmetic number, because the mean of its divisors is an integer number (822502462266).

Almost surely, 2^{1645004924531} is an apocalyptic number.

1645004924531 is a deficient number, since it is larger than the sum of its proper divisors (1).

1645004924531 is an equidigital number, since it uses as much as digits as its factorization.

1645004924531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 518400, while the sum is 44.

Adding to 1645004924531 its reverse (1354294005461), we get a palindrome (2999298929992).

The spelling of 1645004924531 in words is "one trillion, six hundred forty-five billion, four million, nine hundred twenty-four thousand, five hundred thirty-one".