642551852627 has 8 divisors (see below), whose sum is σ = 663321052032. Its totient is φ = 621785260800.

The previous prime is 642551852597. The next prime is 642551852639. The reversal of 642551852627 is 726258155246.

642551852627 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 642551852627 - 2³⁰ = 641478110803 is a prime.

It is a super-2 number, since 2×642551852627² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (642551852647) 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, 144824 + ... + 1142837.

It is an arithmetic number, because the mean of its divisors is an integer number (82915131504).

Almost surely, 2^642551852627 is an apocalyptic number.

642551852627 is a deficient number, since it is larger than the sum of its proper divisors (20769199405).

642551852627 is a wasteful number, since it uses less digits than its factorization.

642551852627 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1303789.

The product of its digits is 8064000, while the sum is 53.

The spelling of 642551852627 in words is "six hundred forty-two billion, five hundred fifty-one million, eight hundred fifty-two thousand, six hundred twenty-seven".