642558614347 has 32 divisors (see below), whose sum is σ = 727631364096. Its totient is φ = 563390553600.

The previous prime is 642558614287. The next prime is 642558614389. The reversal of 642558614347 is 743416855246.

It is not a de Polignac number, because 642558614347 - 2¹¹ = 642558612299 is a prime.

It is not an unprimeable number, because it can be changed into a prime (642558614647) 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 31 ways as a sum of consecutive naturals, for example, 4622022 + ... + 4759012.

It is an arithmetic number, because the mean of its divisors is an integer number (22738480128).

Almost surely, 2^642558614347 is an apocalyptic number.

642558614347 is a deficient number, since it is larger than the sum of its proper divisors (85072749749).

642558614347 is a wasteful number, since it uses less digits than its factorization.

642558614347 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137251.

The product of its digits is 19353600, while the sum is 55.

It can be divided in two parts, 642558 and 614347, that added together give a triangular number (1256905 = T₁₅₈₅).

The spelling of 642558614347 in words is "six hundred forty-two billion, five hundred fifty-eight million, six hundred fourteen thousand, three hundred forty-seven".