1634571253 has 12 divisors (see below), whose sum is σ = 1902202860. Its totient is φ = 1400499072.

The previous prime is 1634571247. The next prime is 1634571259. The reversal of 1634571253 is 3521754361.

It is an interprime number because it is at equal distance from previous prime (1634571247) and next prime (1634571259).

It can be written as a sum of positive squares in 2 ways, for example, as 1018439569 + 616131684 = 31913^2 + 24822^2 .

It is not a de Polignac number, because 1634571253 - 2⁵ = 1634571221 is a prime.

It is a super-2 number, since 2×1634571253² = 5343646362267980018, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1634571259) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 157303 + ... + 167371.

It is an arithmetic number, because the mean of its divisors is an integer number (158516905).

Almost surely, 2^1634571253 is an apocalyptic number.

It is an amenable number.

1634571253 is a deficient number, since it is larger than the sum of its proper divisors (267631607).

1634571253 is a wasteful number, since it uses less digits than its factorization.

1634571253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13396 (or 13389 counting only the distinct ones).

The product of its digits is 75600, while the sum is 37.

The square root of 1634571253 is about 40429.8312264595. The cubic root of 1634571253 is about 1177.9710544185.

The spelling of 1634571253 in words is "one billion, six hundred thirty-four million, five hundred seventy-one thousand, two hundred fifty-three".