61263881 has 16 divisors (see below), whose sum is σ = 74850048. Its totient is φ = 48998400.

The previous prime is 61263857. The next prime is 61263893. The reversal of 61263881 is 18836216.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61263881 is a prime.

It is a super-2 number, since 2×61263881² = 7506526230364322, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (61263821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1961 + ... + 11241.

It is an arithmetic number, because the mean of its divisors is an integer number (4678128).

Almost surely, 2^61263881 is an apocalyptic number.

It is an amenable number.

61263881 is a deficient number, since it is larger than the sum of its proper divisors (13586167).

61263881 is a wasteful number, since it uses less digits than its factorization.

61263881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9352.

The product of its digits is 13824, while the sum is 35.

The square root of 61263881 is about 7827.1246955699. The cubic root of 61263881 is about 394.2165339000.

The spelling of 61263881 in words is "sixty-one million, two hundred sixty-three thousand, eight hundred eighty-one".