126123726550 has 24 divisors (see below), whose sum is σ = 234604125000. Its totient is φ = 50446481280.

The previous prime is 126123726481. The next prime is 126123726559. The reversal of 126123726550 is 55627321621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126123726559) 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 11 ways as a sum of consecutive naturals, for example, 895326 + ... + 1026574.

It is an arithmetic number, because the mean of its divisors is an integer number (9775171875).

Almost surely, 2^126123726550 is an apocalyptic number.

126123726550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

126123726550 is a deficient number, since it is larger than the sum of its proper divisors (108480398450).

126123726550 is a wasteful number, since it uses less digits than its factorization.

126123726550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150480 (or 150475 counting only the distinct ones).

The product of its (nonzero) digits is 151200, while the sum is 40.

The spelling of 126123726550 in words is "one hundred twenty-six billion, one hundred twenty-three million, seven hundred twenty-six thousand, five hundred fifty".