49945126123 has 18 divisors (see below), whose sum is σ = 51666019724. Its totient is φ = 48255424224.

The previous prime is 49945126117. The next prime is 49945126157. The reversal of 49945126123 is 32162154994.

It is not a de Polignac number, because 49945126123 - 2³³ = 41355191531 is a prime.

It is a super-2 number, since 2×49945126123² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (49945126223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 253528461 + ... + 253528657.

Almost surely, 2^49945126123 is an apocalyptic number.

49945126123 is a gapful number since it is divisible by the number (43) formed by its first and last digit.

49945126123 is a deficient number, since it is larger than the sum of its proper divisors (1720893601).

49945126123 is an frugal number, since it uses more digits than its factorization.

49945126123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 783 (or 413 counting only the distinct ones).

The product of its digits is 466560, while the sum is 46.

The spelling of 49945126123 in words is "forty-nine billion, nine hundred forty-five million, one hundred twenty-six thousand, one hundred twenty-three".