61681373050 has 96 divisors (see below), whose sum is σ = 127410148800. Its totient is φ = 22027008000.

The previous prime is 61681373009. The next prime is 61681373057. The reversal of 61681373050 is 5037318616.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 61681372994 and 61681373012.

It is not an unprimeable number, because it can be changed into a prime (61681373057) 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 47 ways as a sum of consecutive naturals, for example, 31166961 + ... + 31168939.

It is an arithmetic number, because the mean of its divisors is an integer number (1327189050).

Almost surely, 2^61681373050 is an apocalyptic number.

61681373050 is an abundant number, since it is smaller than the sum of its proper divisors (65728775750).

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

61681373050 is a wasteful number, since it uses less digits than its factorization.

61681373050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2992 (or 2987 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 40.

The spelling of 61681373050 in words is "sixty-one billion, six hundred eighty-one million, three hundred seventy-three thousand, fifty".