1361552550525 has 36 divisors (see below), whose sum is σ = 2439240858132. Its totient is φ = 725997899520.

The previous prime is 1361552550509. The next prime is 1361552550559. The reversal of 1361552550525 is 5250552551631.

1361552550525 is a `hidden beast` number, since 1 + 3 + 6 + 1 + 55 + 25 + 50 + 525 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 179503047684 + 1182049502841 = 423678^2 + 1087221^2 .

It is not a de Polignac number, because 1361552550525 - 2⁴ = 1361552550509 is a prime.

It is a super-2 number, since 2×1361552550525² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 323967 + ... + 1681683.

Almost surely, 2^{1361552550525} is an apocalyptic number.

1361552550525 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1361552550525 is a deficient number, since it is larger than the sum of its proper divisors (1077688307607).

1361552550525 is a wasteful number, since it uses less digits than its factorization.

1361552550525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1362190 (or 1362182 counting only the distinct ones).

The product of its (nonzero) digits is 1125000, while the sum is 45.

The spelling of 1361552550525 in words is "one trillion, three hundred sixty-one billion, five hundred fifty-two million, five hundred fifty thousand, five hundred twenty-five".