1872488455321 has 45 divisors (see below), whose sum is σ = 2116787554245. Its totient is φ = 1656352781160.

The previous prime is 1872488455249. The next prime is 1872488455339. The reversal of 1872488455321 is 1235548842781.

The square root of 1872488455321 is 1368389.

It is a perfect power (a square), and thus also a powerful number.

It is a de Polignac number, because none of the positive numbers 2^k-1872488455321 is a prime.

It is a super-2 number, since 2×1872488455321² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1872488455361) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 7119727836 + ... + 7119728098.

Almost surely, 2^{1872488455321} is an apocalyptic number.

1872488455321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1872488455321 is the 1368389-th square number.

1872488455321 is the 684195-th centered octagonal number.

It is an amenable number.

1872488455321 is a deficient number, since it is larger than the sum of its proper divisors (244299098924).

1872488455321 is an frugal number, since it uses more digits than its factorization.

1872488455321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 656 (or 317 counting only the distinct ones).

The product of its digits is 17203200, while the sum is 58.

The spelling of 1872488455321 in words is "one trillion, eight hundred seventy-two billion, four hundred eighty-eight million, four hundred fifty-five thousand, three hundred twenty-one".