126531200263 has 12 divisors (see below), whose sum is σ = 137236699560. Its totient is φ = 116607400416.

The previous prime is 126531200239. The next prime is 126531200267. The reversal of 126531200263 is 362002135621.

It is a happy number.

It is not a de Polignac number, because 126531200263 - 2²¹ = 126529103111 is a prime.

It is a super-2 number, since 2×126531200263² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126531200267) 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, 507093 + ... + 714286.

It is an arithmetic number, because the mean of its divisors is an integer number (11436391630).

Almost surely, 2^126531200263 is an apocalyptic number.

126531200263 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

126531200263 is a deficient number, since it is larger than the sum of its proper divisors (10705499297).

126531200263 is a wasteful number, since it uses less digits than its factorization.

126531200263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1222018 (or 1222005 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 31.

Adding to 126531200263 its reverse (362002135621), we get a palindrome (488533335884).

The spelling of 126531200263 in words is "one hundred twenty-six billion, five hundred thirty-one million, two hundred thousand, two hundred sixty-three".