1645636553126 has 8 divisors (see below), whose sum is σ = 2535169825200. Its totient is φ = 800579944728.

The previous prime is 1645636553047. The next prime is 1645636553137. The reversal of 1645636553126 is 6213556365461.

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

It is a congruent number.

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, 11119165826 + ... + 11119165973.

It is an arithmetic number, because the mean of its divisors is an integer number (316896228150).

Almost surely, 2^{1645636553126} is an apocalyptic number.

1645636553126 is a deficient number, since it is larger than the sum of its proper divisors (889533272074).

1645636553126 is a wasteful number, since it uses less digits than its factorization.

1645636553126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22238331838.

The product of its digits is 11664000, while the sum is 53.

The spelling of 1645636553126 in words is "one trillion, six hundred forty-five billion, six hundred thirty-six million, five hundred fifty-three thousand, one hundred twenty-six".