1611249422500 has 135 divisors (see below), whose sum is σ = 3598728320341. Its totient is φ = 631019272000.

The previous prime is 1611249422473. The next prime is 1611249422501. The reversal of 1611249422500 is 52249421161.

The square root of 1611249422500 is 1269350.

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 894057238116 + 717192184384 = 945546^2 + 846872^2 .

It is a super-2 number, since 2×1611249422500² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1611249422500.

It is not an unprimeable number, because it can be changed into a prime (1611249422501) 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, 3363777261 + ... + 3363777739.

Almost surely, 2^{1611249422500} is an apocalyptic number.

1611249422500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1611249422500 is the 1269350-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1611249422500

1611249422500 is an abundant number, since it is smaller than the sum of its proper divisors (1987478897841).

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

1611249422500 is an frugal number, since it uses more digits than its factorization.

1611249422500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1088 (or 539 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 37.

The spelling of 1611249422500 in words is "one trillion, six hundred eleven billion, two hundred forty-nine million, four hundred twenty-two thousand, five hundred".