61791642 has 48 divisors (see below), whose sum is σ = 146577600. Its totient is φ = 18657600.

The previous prime is 61791607. The next prime is 61791647. The reversal of 61791642 is 24619716.

61791642 is a `hidden beast` number, since 6 + 1 + 7 + 9 + 1 + 642 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 61791597 and 61791606.

It is not an unprimeable number, because it can be changed into a prime (61791647) 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 23 ways as a sum of consecutive naturals, for example, 102859 + ... + 103457.

It is an arithmetic number, because the mean of its divisors is an integer number (3053700).

Almost surely, 2^61791642 is an apocalyptic number.

61791642 is an abundant number, since it is smaller than the sum of its proper divisors (84785958).

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

61791642 is a wasteful number, since it uses less digits than its factorization.

61791642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1139 (or 1136 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 61791642 is about 7860.7659932096. The cubic root of 61791642 is about 395.3452986592.

The spelling of 61791642 in words is "sixty-one million, seven hundred ninety-one thousand, six hundred forty-two".