642611654430 has 16 divisors (see below), whose sum is σ = 1542267970704. Its totient is φ = 171363107840.

The previous prime is 642611654407. The next prime is 642611654431. The reversal of 642611654430 is 34456116246.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642611654431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10710194211 + ... + 10710194270.

It is an arithmetic number, because the mean of its divisors is an integer number (96391748169).

Almost surely, 2^642611654430 is an apocalyptic number.

642611654430 is an abundant number, since it is smaller than the sum of its proper divisors (899656316274).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

642611654430 is a wasteful number, since it uses less digits than its factorization.

642611654430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21420388491.

The product of its (nonzero) digits is 414720, while the sum is 42.

The spelling of 642611654430 in words is "six hundred forty-two billion, six hundred eleven million, six hundred fifty-four thousand, four hundred thirty".