642501768147 has 8 divisors (see below), whose sum is σ = 862342329600. Its totient is φ = 425497859400.

The previous prime is 642501768137. The next prime is 642501768179. The reversal of 642501768147 is 741867105246.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 642501768147 - 2⁸ = 642501767891 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 642501768147.

It is not an unprimeable number, because it can be changed into a prime (642501768137) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 709162647 + ... + 709163552.

It is an arithmetic number, because the mean of its divisors is an integer number (107792791200).

Almost surely, 2^642501768147 is an apocalyptic number.

642501768147 is a deficient number, since it is larger than the sum of its proper divisors (219840561453).

642501768147 is a wasteful number, since it uses less digits than its factorization.

642501768147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1418326353.

The product of its (nonzero) digits is 2257920, while the sum is 51.

The spelling of 642501768147 in words is "six hundred forty-two billion, five hundred one million, seven hundred sixty-eight thousand, one hundred forty-seven".