61975881 has 16 divisors (see below), whose sum is σ = 100163520. Its totient is φ = 37560960.

The previous prime is 61975843. The next prime is 61975889. The reversal of 61975881 is 18857916.

61975881 is a `hidden beast` number, since 61 + 9 + 7 + 588 + 1 = 666.

It is not a de Polignac number, because 61975881 - 2⁹ = 61975369 is a prime.

It is a super-2 number, since 2×61975881² = 7682019651452322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (61975889) 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, 104040 + ... + 104633.

It is an arithmetic number, because the mean of its divisors is an integer number (6260220).

Almost surely, 2^61975881 is an apocalyptic number.

It is an amenable number.

61975881 is a deficient number, since it is larger than the sum of its proper divisors (38187639).

61975881 is a wasteful number, since it uses less digits than its factorization.

61975881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208693 (or 208687 counting only the distinct ones).

The product of its digits is 120960, while the sum is 45.

The square root of 61975881 is about 7872.4761670011. The cubic root of 61975881 is about 395.7378315224.

The spelling of 61975881 in words is "sixty-one million, nine hundred seventy-five thousand, eight hundred eighty-one".