727521374640 has 80 divisors (see below), whose sum is σ = 2328068422656. Its totient is φ = 187747449600.

The previous prime is 727521374633. The next prime is 727521374683. The reversal of 727521374640 is 46473125727.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 727521374640.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 48885126 + ... + 48900005.

Almost surely, 2^727521374640 is an apocalyptic number.

It is an amenable number.

727521374640 is an abundant number, since it is smaller than the sum of its proper divisors (1600547048016).

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

727521374640 is a wasteful number, since it uses less digits than its factorization.

727521374640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97785178 (or 97785172 counting only the distinct ones).

The product of its (nonzero) digits is 1975680, while the sum is 48.

The spelling of 727521374640 in words is "seven hundred twenty-seven billion, five hundred twenty-one million, three hundred seventy-four thousand, six hundred forty".