645113060142621 has 32 divisors (see below), whose sum is σ = 1041410995642368. Its totient is φ = 346766124967680.

The previous prime is 645113060142533. The next prime is 645113060142667. The reversal of 645113060142621 is 126241060311546.

It is not a de Polignac number, because 645113060142621 - 2⁷ = 645113060142493 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645113060142671) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 482239425 + ... + 483575318.

It is an arithmetic number, because the mean of its divisors is an integer number (32544093613824).

Almost surely, 2^{645113060142621} is an apocalyptic number.

It is an amenable number.

645113060142621 is a deficient number, since it is larger than the sum of its proper divisors (396297935499747).

645113060142621 is a wasteful number, since it uses less digits than its factorization.

645113060142621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 965816641.

The product of its (nonzero) digits is 207360, while the sum is 42.

The spelling of 645113060142621 in words is "six hundred forty-five trillion, one hundred thirteen billion, sixty million, one hundred forty-two thousand, six hundred twenty-one".