642312601620 has 24 divisors (see below), whose sum is σ = 1798475284704. Its totient is φ = 171283360416.

The previous prime is 642312601613. The next prime is 642312601627. The reversal of 642312601620 is 26106213246.

It is an interprime number because it is at equal distance from previous prime (642312601613) and next prime (642312601627).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642312601627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5352604954 + ... + 5352605073.

It is an arithmetic number, because the mean of its divisors is an integer number (74936470196).

Almost surely, 2^642312601620 is an apocalyptic number.

642312601620 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

642312601620 is an abundant number, since it is smaller than the sum of its proper divisors (1156162683084).

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

642312601620 is a wasteful number, since it uses less digits than its factorization.

642312601620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10705210039 (or 10705210037 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 33.

Adding to 642312601620 its reverse (26106213246), we get a palindrome (668418814866).

The spelling of 642312601620 in words is "six hundred forty-two billion, three hundred twelve million, six hundred one thousand, six hundred twenty".