645050136132523 has 8 divisors (see below), whose sum is σ = 704889849867840. Its totient is φ = 585410221108680.

The previous prime is 645050136132503. The next prime is 645050136132533. The reversal of 645050136132523 is 325231631050546.

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

It is a de Polignac number, because none of the positive numbers 2^k-645050136132523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (645050136132503) 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, 49949671113 + ... + 49949684026.

It is an arithmetic number, because the mean of its divisors is an integer number (88111231233480).

Almost surely, 2^{645050136132523} is an apocalyptic number.

645050136132523 is a deficient number, since it is larger than the sum of its proper divisors (59839713735317).

645050136132523 is a wasteful number, since it uses less digits than its factorization.

645050136132523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99899355737.

The product of its (nonzero) digits is 1944000, while the sum is 46.

The spelling of 645050136132523 in words is "six hundred forty-five trillion, fifty billion, one hundred thirty-six million, one hundred thirty-two thousand, five hundred twenty-three".