61648630 has 32 divisors (see below), whose sum is σ = 118397376. Its totient is φ = 23030784.

The previous prime is 61648621. The next prime is 61648663. The reversal of 61648630 is 3684616.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21967 + ... + 24613.

It is an arithmetic number, because the mean of its divisors is an integer number (3699918).

Almost surely, 2^61648630 is an apocalyptic number.

61648630 is a deficient number, since it is larger than the sum of its proper divisors (56748746).

61648630 is a wasteful number, since it uses less digits than its factorization.

61648630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2808.

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 61648630 is about 7851.6641548146. The cubic root of 61648630 is about 395.0400643013.

The spelling of 61648630 in words is "sixty-one million, six hundred forty-eight thousand, six hundred thirty".