61983638916 has 48 divisors (see below), whose sum is σ = 147760091136. Its totient is φ = 20214165664.

The previous prime is 61983638903. The next prime is 61983638921.

61983638916 is nontrivially palindromic in base 10.

It is a super-3 number, since 3×61983638916³ (a number of 33 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 61983638916.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1632055 + ... + 1669601.

It is an arithmetic number, because the mean of its divisors is an integer number (3078335232).

Almost surely, 2^61983638916 is an apocalyptic number.

It is an amenable number.

61983638916 is an abundant number, since it is smaller than the sum of its proper divisors (85776452220).

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

61983638916 is a wasteful number, since it uses less digits than its factorization.

61983638916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40528 (or 40526 counting only the distinct ones).

The product of its digits is 10077696, while the sum is 60.

The spelling of 61983638916 in words is "sixty-one billion, nine hundred eighty-three million, six hundred thirty-eight thousand, nine hundred sixteen".