61881141231 has 36 divisors (see below), whose sum is σ = 110615392368. Its totient is φ = 32640596352.

The previous prime is 61881141209. The next prime is 61881141281. The reversal of 61881141231 is 13214118816.

61881141231 is a `hidden beast` number, since 618 + 8 + 1 + 1 + 4 + 1 + 2 + 31 = 666.

It is not a de Polignac number, because 61881141231 - 2¹⁷ = 61881010159 is a prime.

It is a super-2 number, since 2×61881141231² (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 (61881141281) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2895390 + ... + 2916683.

It is an arithmetic number, because the mean of its divisors is an integer number (3072649788).

Almost surely, 2^61881141231 is an apocalyptic number.

61881141231 is a deficient number, since it is larger than the sum of its proper divisors (48734251137).

61881141231 is a wasteful number, since it uses less digits than its factorization.

61881141231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5812112 (or 5812096 counting only the distinct ones).

The product of its digits is 9216, while the sum is 36.

The spelling of 61881141231 in words is "sixty-one billion, eight hundred eighty-one million, one hundred forty-one thousand, two hundred thirty-one".