642535535246 has 16 divisors (see below), whose sum is σ = 1051462581120. Its totient is φ = 292050274680.

The previous prime is 642535535233. The next prime is 642535535263.

It is a happy number.

642535535246 is nontrivially palindromic in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 642535535194 and 642535535203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27095 + ... + 1133933.

It is an arithmetic number, because the mean of its divisors is an integer number (65716411320).

Almost surely, 2^642535535246 is an apocalyptic number.

642535535246 is a deficient number, since it is larger than the sum of its proper divisors (408927045874).

642535535246 is a wasteful number, since it uses less digits than its factorization.

642535535246 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1133239.

The product of its digits is 12960000, while the sum is 50.

The spelling of 642535535246 in words is "six hundred forty-two billion, five hundred thirty-five million, five hundred thirty-five thousand, two hundred forty-six".