642127667156 has 12 divisors (see below), whose sum is σ = 1126785336768. Its totient is φ = 320188999512.

The previous prime is 642127667143. The next prime is 642127667173. The reversal of 642127667156 is 651766721246.

It is a happy number.

642127667156 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×642127667156² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 642127667098 and 642127667107.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 218706866 + ... + 218709801.

It is an arithmetic number, because the mean of its divisors is an integer number (93898778064).

Almost surely, 2^642127667156 is an apocalyptic number.

It is an amenable number.

642127667156 is a deficient number, since it is larger than the sum of its proper divisors (484657669612).

642127667156 is a wasteful number, since it uses less digits than its factorization.

642127667156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 437417038 (or 437417036 counting only the distinct ones).

The product of its digits is 5080320, while the sum is 53.

The spelling of 642127667156 in words is "six hundred forty-two billion, one hundred twenty-seven million, six hundred sixty-seven thousand, one hundred fifty-six".