1645432320151 has 8 divisors (see below), whose sum is σ = 1649662416864. Its totient is φ = 1641206029440.

The previous prime is 1645432320139. The next prime is 1645432320163. The reversal of 1645432320151 is 1510232345461.

It is an interprime number because it is at equal distance from previous prime (1645432320139) and next prime (1645432320163).

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 1645432320151 - 2⁷ = 1645432320023 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1645432320151.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1645432320251) 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, 84726 + ... + 1816051.

It is an arithmetic number, because the mean of its divisors is an integer number (206207802108).

Almost surely, 2^{1645432320151} is an apocalyptic number.

1645432320151 is a deficient number, since it is larger than the sum of its proper divisors (4230096713).

1645432320151 is a wasteful number, since it uses less digits than its factorization.

1645432320151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1903001.

The product of its (nonzero) digits is 86400, while the sum is 37.

The spelling of 1645432320151 in words is "one trillion, six hundred forty-five billion, four hundred thirty-two million, three hundred twenty thousand, one hundred fifty-one".