61220464 has 10 divisors (see below), whose sum is σ = 118614680. Its totient is φ = 30610224.

The previous prime is 61220407. The next prime is 61220473. The reversal of 61220464 is 46402216.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1913124 + ... + 1913155.

It is an arithmetic number, because the mean of its divisors is an integer number (11861468).

Almost surely, 2^61220464 is an apocalyptic number.

It is an amenable number.

61220464 is a deficient number, since it is larger than the sum of its proper divisors (57394216).

61220464 is a wasteful number, since it uses less digits than its factorization.

61220464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3826287 (or 3826281 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 61220464 is about 7824.3507078862. The cubic root of 61220464 is about 394.1233863346.

The spelling of 61220464 in words is "sixty-one million, two hundred twenty thousand, four hundred sixty-four".