61767642 has 16 divisors (see below), whose sum is σ = 123851232. Its totient is φ = 20536560.

The previous prime is 61767617. The next prime is 61767649. The reversal of 61767642 is 24676716.

It is a self number, because there is not a number n which added to its sum of digits gives 61767642.

It is not an unprimeable number, because it can be changed into a prime (61767649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10584 + ... + 15347.

It is an arithmetic number, because the mean of its divisors is an integer number (7740702).

Almost surely, 2^61767642 is an apocalyptic number.

61767642 is an abundant number, since it is smaller than the sum of its proper divisors (62083590).

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

61767642 is a wasteful number, since it uses less digits than its factorization.

61767642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26333.

The product of its digits is 84672, while the sum is 39.

The square root of 61767642 is about 7859.2392761641. The cubic root of 61767642 is about 395.2941077238.

The spelling of 61767642 in words is "sixty-one million, seven hundred sixty-seven thousand, six hundred forty-two".