642210452040 has 64 divisors (see below), whose sum is σ = 1926686424960. Its totient is φ = 171251225600.

The previous prime is 642210452011. The next prime is 642210452047. The reversal of 642210452040 is 40254012246.

It is a super-2 number, since 2×642210452040² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 642210451989 and 642210452007.

It is not an unprimeable number, because it can be changed into a prime (642210452047) 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, 6450640 + ... + 6549440.

It is an arithmetic number, because the mean of its divisors is an integer number (30104475390).

Almost surely, 2^642210452040 is an apocalyptic number.

642210452040 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

642210452040 is an abundant number, since it is smaller than the sum of its proper divisors (1284475972920).

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

642210452040 is a wasteful number, since it uses less digits than its factorization.

642210452040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152982 (or 152978 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 30.

Adding to 642210452040 its reverse (40254012246), we get a palindrome (682464464286).

The spelling of 642210452040 in words is "six hundred forty-two billion, two hundred ten million, four hundred fifty-two thousand, forty".