642329071555 has 8 divisors (see below), whose sum is σ = 788720348592. Its totient is φ = 501912948768.

The previous prime is 642329071529. The next prime is 642329071589. The reversal of 642329071555 is 555170923246.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-642329071555 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 642329071499 and 642329071508.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1493788324 + ... + 1493788753.

It is an arithmetic number, because the mean of its divisors is an integer number (98590043574).

Almost surely, 2^642329071555 is an apocalyptic number.

642329071555 is a deficient number, since it is larger than the sum of its proper divisors (146391277037).

642329071555 is a wasteful number, since it uses less digits than its factorization.

642329071555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2987577125.

The product of its (nonzero) digits is 2268000, while the sum is 49.

The spelling of 642329071555 in words is "six hundred forty-two billion, three hundred twenty-nine million, seventy-one thousand, five hundred fifty-five".