642690057959 has 12 divisors (see below), whose sum is σ = 683086624248. Its totient is φ = 604559222400.

The previous prime is 642690057917. The next prime is 642690057967. The reversal of 642690057959 is 959750096246.

It is not a de Polignac number, because 642690057959 - 2⁸ = 642690057703 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642698057959) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 59657 + ... + 1135314.

It is an arithmetic number, because the mean of its divisors is an integer number (56923885354).

Almost surely, 2^642690057959 is an apocalyptic number.

642690057959 is a deficient number, since it is larger than the sum of its proper divisors (40396566289).

642690057959 is a wasteful number, since it uses less digits than its factorization.

642690057959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1196866 (or 1196849 counting only the distinct ones).

The product of its (nonzero) digits is 36741600, while the sum is 62.

The spelling of 642690057959 in words is "six hundred forty-two billion, six hundred ninety million, fifty-seven thousand, nine hundred fifty-nine".