1855997522500 has 135 divisors (see below), whose sum is σ = 4463012407777. Its totient is φ = 674635720000.

The previous prime is 1855997522461. The next prime is 1855997522503. The reversal of 1855997522500 is 52257995581.

The square root of 1855997522500 is 1362350.

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 1423759649796 + 432237872704 = 1193214^2 + 657448^2 .

It is a super-2 number, since 2×1855997522500² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1855997522503) 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, 749291262 + ... + 749293738.

Almost surely, 2^{1855997522500} is an apocalyptic number.

1855997522500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1855997522500 is the 1362350-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1855997522500

1855997522500 is an abundant number, since it is smaller than the sum of its proper divisors (2607014885277).

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

1855997522500 is an frugal number, since it uses more digits than its factorization.

1855997522500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5000 (or 2495 counting only the distinct ones).

The product of its (nonzero) digits is 11340000, while the sum is 58.

The spelling of 1855997522500 in words is "one trillion, eight hundred fifty-five billion, nine hundred ninety-seven million, five hundred twenty-two thousand, five hundred".