1645630114471 has 4 divisors (see below), whose sum is σ = 1880720130832. Its totient is φ = 1410540098112.

The previous prime is 1645630114409. The next prime is 1645630114507. The reversal of 1645630114471 is 1744110365461.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1645630114471 - 2¹³ = 1645630106279 is a prime.

It is a super-3 number, since 3×1645630114471³ (a number of 38 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1645630114171) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 117545008170 + ... + 117545008183.

It is an arithmetic number, because the mean of its divisors is an integer number (470180032708).

Almost surely, 2^{1645630114471} is an apocalyptic number.

1645630114471 is a deficient number, since it is larger than the sum of its proper divisors (235090016361).

1645630114471 is an equidigital number, since it uses as much as digits as its factorization.

1645630114471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235090016360.

The product of its (nonzero) digits is 241920, while the sum is 43.

The spelling of 1645630114471 in words is "one trillion, six hundred forty-five billion, six hundred thirty million, one hundred fourteen thousand, four hundred seventy-one".