551161770 has 64 divisors (see below), whose sum is σ = 1367815680. Its totient is φ = 142041600.

The previous prime is 551161769. The next prime is 551161771. The reversal of 551161770 is 77161155.

It is an interprime number because it is at equal distance from previous prime (551161769) and next prime (551161771).

It is a super-4 number, since 4×551161770⁴ (a number of 36 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (551161771) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 132015 + ... + 136125.

It is an arithmetic number, because the mean of its divisors is an integer number (21372120).

Almost surely, 2^551161770 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 551161770, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (683907840).

551161770 is an abundant number, since it is smaller than the sum of its proper divisors (816653910).

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

551161770 is a wasteful number, since it uses less digits than its factorization.

551161770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4271.

The product of its (nonzero) digits is 7350, while the sum is 33.

The square root of 551161770 is about 23476.8347525811. The cubic root of 551161770 is about 819.8977514785.

The spelling of 551161770 in words is "five hundred fifty-one million, one hundred sixty-one thousand, seven hundred seventy".