1012161553 has 8 divisors (see below), whose sum is σ = 1094701608. Its totient is φ = 930290304.

The previous prime is 1012161551. The next prime is 1012161637. The reversal of 1012161553 is 3551612101.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3972049 + 1008189504 = 1993^2 + 31752^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1012161553 - 2¹ = 1012161551 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1012161551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 164050 + ... + 170107.

It is an arithmetic number, because the mean of its divisors is an integer number (136837701).

Almost surely, 2^1012161553 is an apocalyptic number.

1012161553 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1012161553 is a deficient number, since it is larger than the sum of its proper divisors (82540055).

1012161553 is a wasteful number, since it uses less digits than its factorization.

1012161553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334403.

The product of its (nonzero) digits is 900, while the sum is 25.

The square root of 1012161553 is about 31814.4865273667. The cubic root of 1012161553 is about 1004.0375274328.

Adding to 1012161553 its reverse (3551612101), we get a palindrome (4563773654).

The spelling of 1012161553 in words is "one billion, twelve million, one hundred sixty-one thousand, five hundred fifty-three".