133863636420 has 192 divisors, whose sum is σ = 433187758080. Its totient is φ = 34281187200.

The previous prime is 133863636409. The next prime is 133863636479. The reversal of 133863636420 is 24636368331.

133863636420 is a `hidden beast` number, since 1 + 3 + 3 + 8 + 6 + 3 + 636 + 4 + 2 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2162419 + ... + 2223461.

It is an arithmetic number, because the mean of its divisors is an integer number (2256186240).

Almost surely, 2^133863636420 is an apocalyptic number.

133863636420 is a gapful number since it is divisible by the number (10) 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 133863636420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (216593879040).

133863636420 is an abundant number, since it is smaller than the sum of its proper divisors (299324121660).

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

133863636420 is a wasteful number, since it uses less digits than its factorization.

133863636420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61223 (or 61215 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 45.

The spelling of 133863636420 in words is "one hundred thirty-three billion, eight hundred sixty-three million, six hundred thirty-six thousand, four hundred twenty".