2154512011464 has 48 divisors (see below), whose sum is σ = 5836654249920. Its totient is φ = 717983894880.

The previous prime is 2154512011453. The next prime is 2154512011469. The reversal of 2154512011464 is 4641102154512.

2154512011464 is a `hidden beast` number, since 2 + 15 + 451 + 20 + 114 + 64 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (2154512011469) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3612252 + ... + 4166219.

It is an arithmetic number, because the mean of its divisors is an integer number (121596963540).

Almost surely, 2^{2154512011464} is an apocalyptic number.

2154512011464 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2154512011464 is an abundant number, since it is smaller than the sum of its proper divisors (3682142238456).

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

2154512011464 is a wasteful number, since it uses less digits than its factorization.

2154512011464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7782330 (or 7782323 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 36.

Adding to 2154512011464 its reverse (4641102154512), we get a palindrome (6795614165976).

The spelling of 2154512011464 in words is "two trillion, one hundred fifty-four billion, five hundred twelve million, eleven thousand, four hundred sixty-four".