72852465640 has 16 divisors (see below), whose sum is σ = 163918047780. Its totient is φ = 29140986240.

The previous prime is 72852465593. The next prime is 72852465649. The reversal of 72852465640 is 4656425827.

It can be written as a sum of positive squares in 2 ways, for example, as 69921109476 + 2931356164 = 264426^2 + 54142^2 .

It is not an unprimeable number, because it can be changed into a prime (72852465649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 910655781 + ... + 910655860.

Almost surely, 2^72852465640 is an apocalyptic number.

It is an amenable number.

72852465640 is an abundant number, since it is smaller than the sum of its proper divisors (91065582140).

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

72852465640 is a wasteful number, since it uses less digits than its factorization.

72852465640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1821311652 (or 1821311648 counting only the distinct ones).

The product of its (nonzero) digits is 3225600, while the sum is 49.

The spelling of 72852465640 in words is "seventy-two billion, eight hundred fifty-two million, four hundred sixty-five thousand, six hundred forty".