61642033536 has 64 divisors (see below), whose sum is σ = 163923404400. Its totient is φ = 20523909120.

The previous prime is 61642033493. The next prime is 61642033543. The reversal of 61642033536 is 63533024616.

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

It is a junction number, because it is equal to n+sod(n) for n = 61642033494 and 61642033503.

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, 247200 + ... + 429408.

Almost surely, 2^61642033536 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 61642033536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81961702200).

61642033536 is an abundant number, since it is smaller than the sum of its proper divisors (102281370864).

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

61642033536 is a wasteful number, since it uses less digits than its factorization.

61642033536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183107 (or 183095 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 39.

The spelling of 61642033536 in words is "sixty-one billion, six hundred forty-two million, thirty-three thousand, five hundred thirty-six".