642674481111 has 12 divisors (see below), whose sum is σ = 999715859688. Its totient is φ = 395491988304.

The previous prime is 642674481079. The next prime is 642674481139. The reversal of 642674481111 is 111184476246.

642674481111 is a `hidden beast` number, since 6 + 426 + 74 + 48 + 1 + 111 = 666.

It is not a de Polignac number, because 642674481111 - 2⁵ = 642674481079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642674481161) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2746472025 + ... + 2746472258.

It is an arithmetic number, because the mean of its divisors is an integer number (83309654974).

Almost surely, 2^642674481111 is an apocalyptic number.

642674481111 is a deficient number, since it is larger than the sum of its proper divisors (357041378577).

642674481111 is a wasteful number, since it uses less digits than its factorization.

642674481111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5492944302 (or 5492944299 counting only the distinct ones).

The product of its digits is 258048, while the sum is 45.

The spelling of 642674481111 in words is "six hundred forty-two billion, six hundred seventy-four million, four hundred eighty-one thousand, one hundred eleven".