55489926906 has 40 divisors (see below), whose sum is σ = 124834004064. Its totient is φ = 18422937000.

The previous prime is 55489926901. The next prime is 55489926907. The reversal of 55489926906 is 60962998455.

55489926906 is a `hidden beast` number, since 5 + 5 + 489 + 92 + 69 + 0 + 6 = 666.

It is not an unprimeable number, because it can be changed into a prime (55489926901) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 641670 + ... + 722993.

Almost surely, 2^55489926906 is an apocalyptic number.

55489926906 is an abundant number, since it is smaller than the sum of its proper divisors (69344077158).

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

55489926906 is a wasteful number, since it uses less digits than its factorization.

55489926906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1364928 (or 1364919 counting only the distinct ones).

The product of its (nonzero) digits is 41990400, while the sum is 63.

Adding to 55489926906 its sum of digits (63), we get a square (55489926969 = 235563²).

The spelling of 55489926906 in words is "fifty-five billion, four hundred eighty-nine million, nine hundred twenty-six thousand, nine hundred six".