1155517502500 has 45 divisors (see below), whose sum is σ = 2527003214967. Its totient is φ = 462185502000.

The previous prime is 1155517502443. The next prime is 1155517502501. The reversal of 1155517502500 is 52057155511.

The square root of 1155517502500 is 1074950.

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 90592572196 + 1064924930304 = 300986^2 + 1031952^2 .

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 1155517502500.

It is not an unprimeable number, because it can be changed into a prime (1155517502501) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 53736751 + ... + 53758249.

Almost surely, 2^{1155517502500} is an apocalyptic number.

1155517502500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1155517502500 is the 1074950-th square number.

It is an amenable number.

1155517502500 is an abundant number, since it is smaller than the sum of its proper divisors (1371485712467).

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

1155517502500 is an frugal number, since it uses more digits than its factorization.

1155517502500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43022 (or 21506 counting only the distinct ones).

The product of its (nonzero) digits is 43750, while the sum is 37.

The spelling of 1155517502500 in words is "one trillion, one hundred fifty-five billion, five hundred seventeen million, five hundred two thousand, five hundred".