642841547076 has 45 divisors (see below), whose sum is σ = 1680552513871. Its totient is φ = 214275705048.

The previous prime is 642841547057. The next prime is 642841547099. The reversal of 642841547076 is 670745148246.

The square root of 642841547076 is 801774.

It is a perfect power (a square), and thus also a powerful number.

642841547076 is a `hidden beast` number, since 6 + 4 + 28 + 4 + 1 + 547 + 0 + 76 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 14409661 + ... + 14454203.

Almost surely, 2^642841547076 is an apocalyptic number.

642841547076 is the 801774-th square number.

It is an amenable number.

642841547076 is an abundant number, since it is smaller than the sum of its proper divisors (1037710966795).

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

642841547076 is an frugal number, since it uses more digits than its factorization.

642841547076 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89102 (or 44548 counting only the distinct ones).

The product of its (nonzero) digits is 9031680, while the sum is 54.

The spelling of 642841547076 in words is "six hundred forty-two billion, eight hundred forty-one million, five hundred forty-seven thousand, seventy-six".