642123576027 has 24 divisors (see below), whose sum is σ = 969994116000. Its totient is φ = 408558087168.

The previous prime is 642123576023. The next prime is 642123576089. The reversal of 642123576027 is 720675321246.

642123576027 is a `hidden beast` number, since 6 + 4 + 2 + 1 + 2 + 35 + 7 + 602 + 7 = 666.

It is not a de Polignac number, because 642123576027 - 2² = 642123576023 is a prime.

It is not an unprimeable number, because it can be changed into a prime (642123576023) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3361452 + ... + 3547337.

It is an arithmetic number, because the mean of its divisors is an integer number (40416421500).

Almost surely, 2^642123576027 is an apocalyptic number.

642123576027 is a deficient number, since it is larger than the sum of its proper divisors (327870539973).

642123576027 is a wasteful number, since it uses less digits than its factorization.

642123576027 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6909267 (or 6909264 counting only the distinct ones).

The product of its (nonzero) digits is 846720, while the sum is 45.

The spelling of 642123576027 in words is "six hundred forty-two billion, one hundred twenty-three million, five hundred seventy-six thousand, twenty-seven".