642217147080 has 64 divisors (see below), whose sum is σ = 2039983885440. Its totient is φ = 161183910912.

The previous prime is 642217147079. The next prime is 642217147081. The reversal of 642217147080 is 80741712246.

It is an interprime number because it is at equal distance from previous prime (642217147079) and next prime (642217147081).

It is not an unprimeable number, because it can be changed into a prime (642217147081) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 157404124 + ... + 157408203.

It is an arithmetic number, because the mean of its divisors is an integer number (31874748210).

Almost surely, 2^642217147080 is an apocalyptic number.

642217147080 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

642217147080 is an abundant number, since it is smaller than the sum of its proper divisors (1397766738360).

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

642217147080 is a wasteful number, since it uses less digits than its factorization.

642217147080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314812358 (or 314812354 counting only the distinct ones).

The product of its (nonzero) digits is 150528, while the sum is 42.

The spelling of 642217147080 in words is "six hundred forty-two billion, two hundred seventeen million, one hundred forty-seven thousand, eighty".