645922960419 has 16 divisors (see below), whose sum is σ = 943422758784. Its totient is φ = 389844105600.

The previous prime is 645922960411. The next prime is 645922960421. The reversal of 645922960419 is 914069229546.

It is not a de Polignac number, because 645922960419 - 2³ = 645922960411 is a prime.

It is a super-2 number, since 2×645922960419² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (645922960411) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40600809 + ... + 40616714.

It is an arithmetic number, because the mean of its divisors is an integer number (58963922424).

Almost surely, 2^645922960419 is an apocalyptic number.

645922960419 is a deficient number, since it is larger than the sum of its proper divisors (297499798365).

645922960419 is a wasteful number, since it uses less digits than its factorization.

645922960419 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81217778.

The product of its (nonzero) digits is 8398080, while the sum is 57.

The spelling of 645922960419 in words is "six hundred forty-five billion, nine hundred twenty-two million, nine hundred sixty thousand, four hundred nineteen".