645086588457 has 8 divisors (see below), whose sum is σ = 883361814976. Its totient is φ = 418434543792.

The previous prime is 645086588441. The next prime is 645086588519. The reversal of 645086588457 is 754885680546.

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

It is not a de Polignac number, because 645086588457 - 2⁴ = 645086588441 is a prime.

It is a super-2 number, since 2×645086588457² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (645086588407) 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, 2905795333 + ... + 2905795554.

It is an arithmetic number, because the mean of its divisors is an integer number (110420226872).

Almost surely, 2^645086588457 is an apocalyptic number.

It is an amenable number.

645086588457 is a deficient number, since it is larger than the sum of its proper divisors (238275226519).

645086588457 is a wasteful number, since it uses less digits than its factorization.

645086588457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5811590927.

The product of its (nonzero) digits is 258048000, while the sum is 66.

The spelling of 645086588457 in words is "six hundred forty-five billion, eighty-six million, five hundred eighty-eight thousand, four hundred fifty-seven".