61636132500 has 120 divisors (see below), whose sum is σ = 181307413056. Its totient is φ = 16290624000.

The previous prime is 61636132489. The next prime is 61636132513. The reversal of 61636132500 is 523163616.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 811137 + ... + 883863.

Almost surely, 2^61636132500 is an apocalyptic number.

61636132500 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61636132500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90653706528).

61636132500 is an abundant number, since it is smaller than the sum of its proper divisors (119671280556).

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

61636132500 is a wasteful number, since it uses less digits than its factorization.

61636132500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72867 (or 72850 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 33.

The spelling of 61636132500 in words is "sixty-one billion, six hundred thirty-six million, one hundred thirty-two thousand, five hundred".