12015342640451 has 8 divisors (see below), whose sum is σ = 12725036825184. Its totient is φ = 11305971713920.

The previous prime is 12015342640447. The next prime is 12015342640523. The reversal of 12015342640451 is 15404624351021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12015342640451 - 2² = 12015342640447 is a prime.

It is a super-2 number, since 2×12015342640451² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12015342642451) 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, 80738015 + ... + 80886696.

It is an arithmetic number, because the mean of its divisors is an integer number (1590629603148).

Almost surely, 2^{12015342640451} is an apocalyptic number.

12015342640451 is a deficient number, since it is larger than the sum of its proper divisors (709694184733).

12015342640451 is a wasteful number, since it uses less digits than its factorization.

12015342640451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161629101.

The product of its (nonzero) digits is 115200, while the sum is 38.

Adding to 12015342640451 its reverse (15404624351021), we get a palindrome (27419966991472).

The spelling of 12015342640451 in words is "twelve trillion, fifteen billion, three hundred forty-two million, six hundred forty thousand, four hundred fifty-one".