10815021661812 has 24 divisors (see below), whose sum is σ = 25402170088512. Its totient is φ = 3581133000000.

The previous prime is 10815021661729. The next prime is 10815021661813. The reversal of 10815021661812 is 21816612051801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10815021661813) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2984275689 + ... + 2984279312.

It is an arithmetic number, because the mean of its divisors is an integer number (1058423753688).

Almost surely, 2^{10815021661812} is an apocalyptic number.

10815021661812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

10815021661812 is an abundant number, since it is smaller than the sum of its proper divisors (14587148426700).

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

10815021661812 is a wasteful number, since it uses less digits than its factorization.

10815021661812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5968555159 (or 5968555157 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 42.

The spelling of 10815021661812 in words is "ten trillion, eight hundred fifteen billion, twenty-one million, six hundred sixty-one thousand, eight hundred twelve".