5161571550 has 36 divisors (see below), whose sum is σ = 13867423440. Its totient is φ = 1376418960.

The previous prime is 5161571533. The next prime is 5161571551. The reversal of 5161571550 is 551751615.

It is a happy number.

5161571550 is a `hidden beast` number, since 51 + 6 + 1 + 57 + 1 + 550 = 666.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5161571551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 5734630 + ... + 5735529.

Almost surely, 2^5161571550 is an apocalyptic number.

5161571550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

5161571550 is an abundant number, since it is smaller than the sum of its proper divisors (8705851890).

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

5161571550 is a wasteful number, since it uses less digits than its factorization.

5161571550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11470177 (or 11470169 counting only the distinct ones).

The product of its (nonzero) digits is 26250, while the sum is 36.

The square root of 5161571550 is about 71844.0780440532. The cubic root of 5161571550 is about 1728.1999330618.

The spelling of 5161571550 in words is "five billion, one hundred sixty-one million, five hundred seventy-one thousand, five hundred fifty".