642445045135 has 16 divisors (see below), whose sum is σ = 793702445184. Its totient is φ = 498923766432.

The previous prime is 642445045097. The next prime is 642445045169. The reversal of 642445045135 is 531540544246.

It is a cyclic number.

It is not a de Polignac number, because 642445045135 - 2⁹ = 642445044623 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 642445045091 and 642445045100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9130957 + ... + 9201046.

It is an arithmetic number, because the mean of its divisors is an integer number (49606402824).

Almost surely, 2^642445045135 is an apocalyptic number.

642445045135 is a deficient number, since it is larger than the sum of its proper divisors (151257400049).

642445045135 is a wasteful number, since it uses less digits than its factorization.

642445045135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18332214.

The product of its (nonzero) digits is 1152000, while the sum is 43.

The spelling of 642445045135 in words is "six hundred forty-two billion, four hundred forty-five million, forty-five thousand, one hundred thirty-five".