61995642 has 32 divisors (see below), whose sum is σ = 127224000. Its totient is φ = 20133120.

The previous prime is 61995631. The next prime is 61995643. The reversal of 61995642 is 24659916.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 61995594 and 61995603.

It is not an unprimeable number, because it can be changed into a prime (61995643) by changing a digit.

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, 40609 + ... + 42107.

It is an arithmetic number, because the mean of its divisors is an integer number (3975750).

Almost surely, 2^61995642 is an apocalyptic number.

61995642 is an abundant number, since it is smaller than the sum of its proper divisors (65228358).

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

61995642 is a wasteful number, since it uses less digits than its factorization.

61995642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1678.

The product of its digits is 116640, while the sum is 42.

The square root of 61995642 is about 7873.7311358720. The cubic root of 61995642 is about 395.7798873682.

The spelling of 61995642 in words is "sixty-one million, nine hundred ninety-five thousand, six hundred forty-two".