642465353536 has 28 divisors (see below), whose sum is σ = 1284197985828. Its totient is φ = 318887908352.

The previous prime is 642465353533. The next prime is 642465353567. The reversal of 642465353536 is 635353564246.

642465353536 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 386486022400 + 255979331136 = 621680^2 + 505944^2 .

It is a super-3 number, since 3×642465353536³ (a number of 36 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642465353533) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36628171 + ... + 36645706.

Almost surely, 2^642465353536 is an apocalyptic number.

It is an amenable number.

642465353536 is a deficient number, since it is larger than the sum of its proper divisors (641732632292).

642465353536 is a wasteful number, since it uses less digits than its factorization.

642465353536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73274026 (or 73274016 counting only the distinct ones).

The product of its digits is 23328000, while the sum is 52.

The spelling of 642465353536 in words is "six hundred forty-two billion, four hundred sixty-five million, three hundred fifty-three thousand, five hundred thirty-six".