2011154635520 has 72 divisors (see below), whose sum is σ = 4919840662464. Its totient is φ = 787345620992.

The previous prime is 2011154635507. The next prime is 2011154635549. The reversal of 2011154635520 is 255364511102.

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, 16654889 + ... + 16775208.

It is an arithmetic number, because the mean of its divisors is an integer number (68331120312).

Almost surely, 2^{2011154635520} is an apocalyptic number.

2011154635520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2011154635520 is an abundant number, since it is smaller than the sum of its proper divisors (2908686026944).

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

2011154635520 is an equidigital number, since it uses as much as digits as its factorization.

2011154635520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33430165 (or 33430151 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 35.

The spelling of 2011154635520 in words is "two trillion, eleven billion, one hundred fifty-four million, six hundred thirty-five thousand, five hundred twenty".