2154638364512 has 48 divisors (see below), whose sum is σ = 4361441765184. Its totient is φ = 1047164544000.

The previous prime is 2154638364511. The next prime is 2154638364517.

2154638364512 is nontrivially palindromic in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2154638364511) 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, 2674439 + ... + 3385542.

It is an arithmetic number, because the mean of its divisors is an integer number (90863370108).

Almost surely, 2^{2154638364512} is an apocalyptic number.

It is an amenable number.

2154638364512 is an abundant number, since it is smaller than the sum of its proper divisors (2206803400672).

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

2154638364512 is a wasteful number, since it uses less digits than its factorization.

2154638364512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6060303 (or 6060295 counting only the distinct ones).

The product of its digits is 4147200, while the sum is 50.

The spelling of 2154638364512 in words is "two trillion, one hundred fifty-four billion, six hundred thirty-eight million, three hundred sixty-four thousand, five hundred twelve".