61146881 has 2 divisors, whose sum is σ = 61146882. Its totient is φ = 61146880.

The previous prime is 61146871. The next prime is 61146887. The reversal of 61146881 is 18864116.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53217025 + 7929856 = 7295^2 + 2816^2 .

It is a cyclic number.

It is not a de Polignac number, because 61146881 - 2¹⁴ = 61130497 is a prime.

It is a super-2 number, since 2×61146881² = 7477882112056322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (61146887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30573440 + 30573441.

It is an arithmetic number, because the mean of its divisors is an integer number (30573441).

Almost surely, 2^61146881 is an apocalyptic number.

It is an amenable number.

61146881 is a deficient number, since it is larger than the sum of its proper divisors (1).

61146881 is an equidigital number, since it uses as much as digits as its factorization.

61146881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9216, while the sum is 35.

The square root of 61146881 is about 7819.6471148000. The cubic root of 61146881 is about 393.9654195045.

The spelling of 61146881 in words is "sixty-one million, one hundred forty-six thousand, eight hundred eighty-one".