61144388 has 12 divisors (see below), whose sum is σ = 107077740. Its totient is φ = 30550752.

The previous prime is 61144367. The next prime is 61144399. The reversal of 61144388 is 88344116.

It can be written as a sum of positive squares in 2 ways, for example, as 48413764 + 12730624 = 6958^2 + 3568^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2258 + ... + 11286.

It is an arithmetic number, because the mean of its divisors is an integer number (8923145).

Almost surely, 2^61144388 is an apocalyptic number.

It is an amenable number.

61144388 is a deficient number, since it is larger than the sum of its proper divisors (45933352).

61144388 is a wasteful number, since it uses less digits than its factorization.

61144388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10726 (or 10724 counting only the distinct ones).

The product of its digits is 18432, while the sum is 35.

The square root of 61144388 is about 7819.4877070049. The cubic root of 61144388 is about 393.9600653522.

The spelling of 61144388 in words is "sixty-one million, one hundred forty-four thousand, three hundred eighty-eight".