61161232503 has 32 divisors (see below), whose sum is σ = 103874019840. Its totient is φ = 31162199040.

The previous prime is 61161232501. The next prime is 61161232511. The reversal of 61161232503 is 30523216116.

It is not a de Polignac number, because 61161232503 - 2¹ = 61161232501 is a prime.

It is a super-2 number, since 2×61161232503² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61161232501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4501638 + ... + 4515203.

It is an arithmetic number, because the mean of its divisors is an integer number (3246063120).

Almost surely, 2^61161232503 is an apocalyptic number.

61161232503 is a deficient number, since it is larger than the sum of its proper divisors (42712787337).

61161232503 is a wasteful number, since it uses less digits than its factorization.

61161232503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9016887.

The product of its (nonzero) digits is 6480, while the sum is 30.

Adding to 61161232503 its reverse (30523216116), we get a palindrome (91684448619).

The spelling of 61161232503 in words is "sixty-one billion, one hundred sixty-one million, two hundred thirty-two thousand, five hundred three".