642674128130 has 16 divisors (see below), whose sum is σ = 1157064830784. Its totient is φ = 257013784560.

The previous prime is 642674128127. The next prime is 642674128133. The reversal of 642674128130 is 31821476246.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (642674128127) and next prime (642674128133).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (642674128133) 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, 6935006 + ... + 7027065.

It is an arithmetic number, because the mean of its divisors is an integer number (72316551924).

Almost surely, 2^642674128130 is an apocalyptic number.

642674128130 is a deficient number, since it is larger than the sum of its proper divisors (514390702654).

642674128130 is a wasteful number, since it uses less digits than its factorization.

642674128130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13966681.

The product of its (nonzero) digits is 387072, while the sum is 44.

The spelling of 642674128130 in words is "six hundred forty-two billion, six hundred seventy-four million, one hundred twenty-eight thousand, one hundred thirty".