61091528 has 8 divisors (see below), whose sum is σ = 114546630. Its totient is φ = 30545760.

The previous prime is 61091509. The next prime is 61091531. The reversal of 61091528 is 82519016.

It can be written as a sum of positive squares in only one way, i.e., 49815364 + 11276164 = 7058^2 + 3358^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 61091494 and 61091503.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3818213 + ... + 3818228.

Almost surely, 2^61091528 is an apocalyptic number.

It is an amenable number.

61091528 is a deficient number, since it is larger than the sum of its proper divisors (53455102).

61091528 is a wasteful number, since it uses less digits than its factorization.

61091528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7636447 (or 7636443 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 32.

The square root of 61091528 is about 7816.1069593500. The cubic root of 61091528 is about 393.8465050093.

The spelling of 61091528 in words is "sixty-one million, ninety-one thousand, five hundred twenty-eight".