642622276485 has 64 divisors (see below), whose sum is σ = 1306844098560. Its totient is φ = 293500445760.

The previous prime is 642622276451. The next prime is 642622276519. The reversal of 642622276485 is 584672226246.

642622276485 is a `hidden beast` number, since 6 + 4 + 2 + 622 + 2 + 7 + 6 + 4 + 8 + 5 = 666.

642622276485 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (642622276451) and next prime (642622276519).

It is not a de Polignac number, because 642622276485 - 2¹² = 642622272389 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 719344 + ... + 1342646.

It is an arithmetic number, because the mean of its divisors is an integer number (20419439040).

Almost surely, 2^642622276485 is an apocalyptic number.

It is an amenable number.

642622276485 is an abundant number, since it is smaller than the sum of its proper divisors (664221822075).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

642622276485 is a wasteful number, since it uses less digits than its factorization.

642622276485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 624415 (or 624409 counting only the distinct ones).

The product of its digits is 15482880, while the sum is 54.

The spelling of 642622276485 in words is "six hundred forty-two billion, six hundred twenty-two million, two hundred seventy-six thousand, four hundred eighty-five".