61456642 has 16 divisors (see below), whose sum is σ = 100961280. Its totient is φ = 27883152.

The previous prime is 61456631. The next prime is 61456643. The reversal of 61456642 is 24665416.

It is a junction number, because it is equal to n+sod(n) for n = 61456598 and 61456607.

It is not an unprimeable number, because it can be changed into a prime (61456643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18498 + ... + 21565.

It is an arithmetic number, because the mean of its divisors is an integer number (6310080).

Almost surely, 2^61456642 is an apocalyptic number.

61456642 is a deficient number, since it is larger than the sum of its proper divisors (39504638).

61456642 is a wasteful number, since it uses less digits than its factorization.

61456642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40137.

The product of its digits is 34560, while the sum is 34.

The square root of 61456642 is about 7839.4286781627. The cubic root of 61456642 is about 394.6295560215.

The spelling of 61456642 in words is "sixty-one million, four hundred fifty-six thousand, six hundred forty-two".