61181463 has 16 divisors (see below), whose sum is σ = 98136320. Its totient is φ = 33120576.

The previous prime is 61181459. The next prime is 61181467. The reversal of 61181463 is 36418116.

It is an interprime number because it is at equal distance from previous prime (61181459) and next prime (61181467).

It is not a de Polignac number, because 61181463 - 2² = 61181459 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61181463.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61181467) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76270 + ... + 77067.

It is an arithmetic number, because the mean of its divisors is an integer number (6133520).

Almost surely, 2^61181463 is an apocalyptic number.

61181463 is a deficient number, since it is larger than the sum of its proper divisors (36954857).

61181463 is a wasteful number, since it uses less digits than its factorization.

61181463 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153366.

The product of its digits is 3456, while the sum is 30.

The square root of 61181463 is about 7821.8580273487. The cubic root of 61181463 is about 394.0396753745.

Adding to 61181463 its reverse (36418116), we get a palindrome (97599579).

The spelling of 61181463 in words is "sixty-one million, one hundred eighty-one thousand, four hundred sixty-three".