61821486 has 24 divisors (see below), whose sum is σ = 141826464. Its totient is φ = 19394880.

The previous prime is 61821457. The next prime is 61821491. The reversal of 61821486 is 68412816.

It is a super-2 number, since 2×61821486² = 7643792262496392, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 61821486.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 100710 + ... + 101321.

It is an arithmetic number, because the mean of its divisors is an integer number (5909436).

Almost surely, 2^61821486 is an apocalyptic number.

61821486 is an abundant number, since it is smaller than the sum of its proper divisors (80004978).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61821486 is a wasteful number, since it uses less digits than its factorization.

61821486 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202056 (or 202053 counting only the distinct ones).

The product of its digits is 18432, while the sum is 36.

The square root of 61821486 is about 7862.6640523426. The cubic root of 61821486 is about 395.4089361012.

The spelling of 61821486 in words is "sixty-one million, eight hundred twenty-one thousand, four hundred eighty-six".