12754155145721 has 32 divisors (see below), whose sum is σ = 14939973227520. Its totient is φ = 10765564286400.

The previous prime is 12754155145631. The next prime is 12754155145751.

12754155145721 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 12754155145721 - 2³⁴ = 12736975276537 is a prime.

It is a super-2 number, since 2×12754155145721² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12754155145721.

It is not an unprimeable number, because it can be changed into a prime (12754155145751) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 446876 + ... + 5070306.

It is an arithmetic number, because the mean of its divisors is an integer number (466874163360).

Almost surely, 2^{12754155145721} is an apocalyptic number.

12754155145721 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12754155145721 is a deficient number, since it is larger than the sum of its proper divisors (2185818081799).

12754155145721 is a wasteful number, since it uses less digits than its factorization.

12754155145721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4623725.

The product of its digits is 1960000, while the sum is 50.

The spelling of 12754155145721 in words is "twelve trillion, seven hundred fifty-four billion, one hundred fifty-five million, one hundred forty-five thousand, seven hundred twenty-one".