321252749040 has 40 divisors (see below), whose sum is σ = 995883522768. Its totient is φ = 85667399680.

The previous prime is 321252749039. The next prime is 321252749063. The reversal of 321252749040 is 40947252123.

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 321252749040.

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, 669276321 + ... + 669276800.

Almost surely, 2^321252749040 is an apocalyptic number.

321252749040 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

321252749040 is an abundant number, since it is smaller than the sum of its proper divisors (674630773728).

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

321252749040 is a wasteful number, since it uses less digits than its factorization.

321252749040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1338553137 (or 1338553131 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 39.

The spelling of 321252749040 in words is "three hundred twenty-one billion, two hundred fifty-two million, seven hundred forty-nine thousand, forty".