1798079855625 has 135 divisors (see below), whose sum is σ = 3428943885939. Its totient is φ = 907538040000.

The previous prime is 1798079855599. The next prime is 1798079855653. The reversal of 1798079855625 is 5265589708971.

The square root of 1798079855625 is 1340925.

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

It can be written as a sum of positive squares in 7 ways, for example, as 1186136631801 + 611943223824 = 1089099^2 + 782268^2 .

It is not a de Polignac number, because 1798079855625 - 2⁷ = 1798079855497 is a prime.

It is a Curzon number.

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 134 ways as a sum of consecutive naturals, for example, 1910817655 + ... + 1910818595.

Almost surely, 2^{1798079855625} is an apocalyptic number.

1798079855625 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1798079855625 is the 1340925-th square number.

1798079855625 is the 670463-rd centered octagonal number.

It is an amenable number.

1798079855625 is a deficient number, since it is larger than the sum of its proper divisors (1630864030314).

1798079855625 is an frugal number, since it uses more digits than its factorization.

1798079855625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1946 (or 968 counting only the distinct ones).

The product of its (nonzero) digits is 381024000, while the sum is 72.

The spelling of 1798079855625 in words is "one trillion, seven hundred ninety-eight billion, seventy-nine million, eight hundred fifty-five thousand, six hundred twenty-five".