12537771381432 has 64 divisors (see below), whose sum is σ = 37993246617600. Its totient is φ = 3799324660320.

The previous prime is 12537771381419. The next prime is 12537771381439. The reversal of 12537771381432 is 23418317773521.

12537771381432 is a `hidden beast` number, since 1 + 2 + 5 + 3 + 7 + 77 + 138 + 1 + 432 = 666.

It is a super-2 number, since 2×12537771381432² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12537771381439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2638417528 + ... + 2638422279.

It is an arithmetic number, because the mean of its divisors is an integer number (593644478400).

Almost surely, 2^{12537771381432} is an apocalyptic number.

12537771381432 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12537771381432 is an abundant number, since it is smaller than the sum of its proper divisors (25455475236168).

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

12537771381432 is a wasteful number, since it uses less digits than its factorization.

12537771381432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5276839833 (or 5276839823 counting only the distinct ones).

The product of its digits is 5927040, while the sum is 54.

The spelling of 12537771381432 in words is "twelve trillion, five hundred thirty-seven billion, seven hundred seventy-one million, three hundred eighty-one thousand, four hundred thirty-two".