61933663616 has 64 divisors (see below), whose sum is σ = 134982536400. Its totient is φ = 28071915520.

The previous prime is 61933663579. The next prime is 61933663699. The reversal of 61933663616 is 61636633916.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 175449296 + ... + 175449648.

Almost surely, 2^61933663616 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61933663616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67491268200).

61933663616 is an abundant number, since it is smaller than the sum of its proper divisors (73048872784).

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

61933663616 is an frugal number, since it uses more digits than its factorization.

61933663616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1084 (or 366 counting only the distinct ones).

The product of its digits is 1889568, while the sum is 50.

The spelling of 61933663616 in words is "sixty-one billion, nine hundred thirty-three million, six hundred sixty-three thousand, six hundred sixteen".