1901847855625 has 15 divisors (see below), whose sum is σ = 2376592163473. Its totient is φ = 1521450703000.

The previous prime is 1901847855619. The next prime is 1901847855647. The reversal of 1901847855625 is 5265587481091.

It is a happy number.

The square root of 1901847855625 is 1379075.

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

It can be written as a sum of positive squares in 2 ways, for example, as 149104871881 + 1752742983744 = 386141^2 + 1323912^2 .

It is not a de Polignac number, because 1901847855625 - 2³ = 1901847855617 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 34449294 + ... + 34504456.

Almost surely, 2^{1901847855625} is an apocalyptic number.

1901847855625 is the 1379075-th square number.

1901847855625 is the 689538-th centered octagonal number.

It is an amenable number.

1901847855625 is a deficient number, since it is larger than the sum of its proper divisors (474744307848).

1901847855625 is an frugal number, since it uses more digits than its factorization.

1901847855625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110346 (or 55168 counting only the distinct ones).

The product of its (nonzero) digits is 24192000, while the sum is 61.

The spelling of 1901847855625 in words is "one trillion, nine hundred one billion, eight hundred forty-seven million, eight hundred fifty-five thousand, six hundred twenty-five".