61938478071 has 6 divisors (see below), whose sum is σ = 89466690560. Its totient is φ = 41292318708.

The previous prime is 61938478031. The next prime is 61938478087. The reversal of 61938478071 is 17087483916.

It is a de Polignac number, because none of the positive numbers 2^k-61938478071 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61938477999 and 61938478017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61938478031) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 3441026551 + ... + 3441026568.

Almost surely, 2^61938478071 is an apocalyptic number.

61938478071 is a deficient number, since it is larger than the sum of its proper divisors (27528212489).

61938478071 is a wasteful number, since it uses less digits than its factorization.

61938478071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6882053125 (or 6882053122 counting only the distinct ones).

The product of its (nonzero) digits is 2032128, while the sum is 54.

The spelling of 61938478071 in words is "sixty-one billion, nine hundred thirty-eight million, four hundred seventy-eight thousand, seventy-one".