126513183220 has 24 divisors (see below), whose sum is σ = 269419627008. Its totient is φ = 49892522400.

The previous prime is 126513183187. The next prime is 126513183233. The reversal of 126513183220 is 22381315621.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 44545476 + ... + 44548315.

It is an arithmetic number, because the mean of its divisors is an integer number (11225817792).

Almost surely, 2^126513183220 is an apocalyptic number.

126513183220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

126513183220 is an abundant number, since it is smaller than the sum of its proper divisors (142906443788).

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

126513183220 is a wasteful number, since it uses less digits than its factorization.

126513183220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89093871 (or 89093869 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 34.

Adding to 126513183220 its reverse (22381315621), we get a palindrome (148894498841).

The spelling of 126513183220 in words is "one hundred twenty-six billion, five hundred thirteen million, one hundred eighty-three thousand, two hundred twenty".