61631742 has 8 divisors (see below), whose sum is σ = 123263496. Its totient is φ = 20543912.

The previous prime is 61631741. The next prime is 61631747. The reversal of 61631742 is 24713616.

It is a sphenic number, since it is the product of 3 distinct primes.

61631742 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61631741) 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 3 ways as a sum of consecutive naturals, for example, 5135973 + ... + 5135984.

It is an arithmetic number, because the mean of its divisors is an integer number (15407937).

Almost surely, 2^61631742 is an apocalyptic number.

61631742 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

61631742 is a wasteful number, since it uses less digits than its factorization.

61631742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10271962.

The product of its digits is 6048, while the sum is 30.

The square root of 61631742 is about 7850.5886403505. The cubic root of 61631742 is about 395.0039886368.

The spelling of 61631742 in words is "sixty-one million, six hundred thirty-one thousand, seven hundred forty-two".