36531361620 has 576 divisors, whose sum is σ = 128706859008. Its totient is φ = 8322048000.

The previous prime is 36531361507. The next prime is 36531361631. The reversal of 36531361620 is 2616313563.

36531361620 is a `hidden beast` number, since 3 + 6 + 5 + 3 + 13 + 616 + 20 = 666.

It is a super-2 number, since 2×36531361620² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 211163854 + ... + 211164026.

It is an arithmetic number, because the mean of its divisors is an integer number (223449408).

Almost surely, 2^36531361620 is an apocalyptic number.

36531361620 is a gapful number since it is divisible by the number (30) 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 36531361620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64353429504).

36531361620 is an abundant number, since it is smaller than the sum of its proper divisors (92175497388).

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

36531361620 is a wasteful number, since it uses less digits than its factorization.

36531361620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344 (or 339 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 36.

The spelling of 36531361620 in words is "thirty-six billion, five hundred thirty-one million, three hundred sixty-one thousand, six hundred twenty".