1555151161249 has 9 divisors (see below), whose sum is σ = 1809063546321. Its totient is φ = 1332979227300.

The previous prime is 1555151161183. The next prime is 1555151161331. The reversal of 1555151161249 is 9421611515551.

The square root of 1555151161249 is 1247057.

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

It is not a de Polignac number, because 1555151161249 - 2²³ = 1555142772641 is a prime.

It is a super-2 number, since 2×1555151161249² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1555151161199 and 1555151161208.

It is not an unprimeable number, because it can be changed into a prime (1555151161549) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 8640324 + ... + 8818474.

Almost surely, 2^{1555151161249} is an apocalyptic number.

1555151161249 is the 1247057-th square number.

1555151161249 is the 623529-th centered octagonal number.

It is an amenable number.

1555151161249 is a deficient number, since it is larger than the sum of its proper divisors (253912385072).

1555151161249 is an frugal number, since it uses more digits than its factorization.

1555151161249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 356316 (or 178158 counting only the distinct ones).

The product of its digits is 270000, while the sum is 46.

The spelling of 1555151161249 in words is "one trillion, five hundred fifty-five billion, one hundred fifty-one million, one hundred sixty-one thousand, two hundred forty-nine".