126640055 has 16 divisors (see below), whose sum is σ = 163949184. Its totient is φ = 93550080.

The previous prime is 126640049. The next prime is 126640109. The reversal of 126640055 is 550046621.

It is not a de Polignac number, because 126640055 - 2⁴ = 126640039 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9551 + ... + 18560.

It is an arithmetic number, because the mean of its divisors is an integer number (10246824).

Almost surely, 2^126640055 is an apocalyptic number.

126640055 is a deficient number, since it is larger than the sum of its proper divisors (37309129).

126640055 is a wasteful number, since it uses less digits than its factorization.

126640055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28186.

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 126640055 is about 11253.4463610043. The cubic root of 126640055 is about 502.1772454432.

Adding to 126640055 its reverse (550046621), we get a palindrome (676686676).

The spelling of 126640055 in words is "one hundred twenty-six million, six hundred forty thousand, fifty-five".