1167555886225 has 9 divisors (see below), whose sum is σ = 1447775998267. Its totient is φ = 934040386840.

The previous prime is 1167555886163. The next prime is 1167555886261. The reversal of 1167555886225 is 5226885557611.

The square root of 1167555886225 is 1080535.

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

It can be written as a sum of positive squares in only one way, i.e., 420320119041 + 747235767184 = 648321^2 + 864428^2 .

It is not a de Polignac number, because 1167555886225 - 2⁷ = 1167555886097 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 5294622 + ... + 5510728.

Almost surely, 2^{1167555886225} is an apocalyptic number.

1167555886225 is the 1080535-th square number.

1167555886225 is the 540268-th centered octagonal number.

It is an amenable number.

1167555886225 is a deficient number, since it is larger than the sum of its proper divisors (280220112042).

1167555886225 is an frugal number, since it uses more digits than its factorization.

1167555886225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432224 (or 216112 counting only the distinct ones).

The product of its digits is 40320000, while the sum is 61.

The spelling of 1167555886225 in words is "one trillion, one hundred sixty-seven billion, five hundred fifty-five million, eight hundred eighty-six thousand, two hundred twenty-five".