2011640452500 has 480 divisors, whose sum is σ = 6946614771712. Its totient is φ = 443232000000.

The previous prime is 2011640452421. The next prime is 2011640452537. The reversal of 2011640452500 is 52540461102.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 441050220 + ... + 441054780.

Almost surely, 2^{2011640452500} is an apocalyptic number.

2011640452500 is a gapful number since it is divisible by the number (20) 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 2011640452500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3473307385856).

2011640452500 is an abundant number, since it is smaller than the sum of its proper divisors (4934974319212).

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

2011640452500 is a wasteful number, since it uses less digits than its factorization.

2011640452500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4897 (or 4880 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 30.

The spelling of 2011640452500 in words is "two trillion, eleven billion, six hundred forty million, four hundred fifty-two thousand, five hundred".