642880249225 has 12 divisors (see below), whose sum is σ = 814132606464. Its totient is φ = 503361555920.

The previous prime is 642880249217. The next prime is 642880249237. The reversal of 642880249225 is 522942088246.

642880249225 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 642880249225 - 2³ = 642880249217 is a prime.

It is a super-2 number, since 2×642880249225² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 273564889 + ... + 273567238.

It is an arithmetic number, because the mean of its divisors is an integer number (67844383872).

Almost surely, 2^642880249225 is an apocalyptic number.

It is an amenable number.

642880249225 is a deficient number, since it is larger than the sum of its proper divisors (171252357239).

642880249225 is a wasteful number, since it uses less digits than its factorization.

642880249225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 547132184 (or 547132179 counting only the distinct ones).

The product of its (nonzero) digits is 4423680, while the sum is 52.

The spelling of 642880249225 in words is "six hundred forty-two billion, eight hundred eighty million, two hundred forty-nine thousand, two hundred twenty-five".