61985436142 has 48 divisors (see below), whose sum is σ = 112940388000. Its totient is φ = 24988948992.

The previous prime is 61985436137. The next prime is 61985436181. The reversal of 61985436142 is 24163458916.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11119668 + ... + 11125240.

It is an arithmetic number, because the mean of its divisors is an integer number (2352924750).

Almost surely, 2^61985436142 is an apocalyptic number.

61985436142 is a deficient number, since it is larger than the sum of its proper divisors (50954951858).

61985436142 is a wasteful number, since it uses less digits than its factorization.

61985436142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8365 (or 8348 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 49.

The spelling of 61985436142 in words is "sixty-one billion, nine hundred eighty-five million, four hundred thirty-six thousand, one hundred forty-two".