55431019790 has 32 divisors (see below), whose sum is σ = 104209342560. Its totient is φ = 21207498624.

The previous prime is 55431019789. The next prime is 55431019793. The reversal of 55431019790 is 9791013455.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55431019793) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1247777 + ... + 1291436.

It is an arithmetic number, because the mean of its divisors is an integer number (3256541955).

Almost surely, 2^55431019790 is an apocalyptic number.

55431019790 is a deficient number, since it is larger than the sum of its proper divisors (48778322770).

55431019790 is a wasteful number, since it uses less digits than its factorization.

55431019790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2539316.

The product of its (nonzero) digits is 170100, while the sum is 44.

The spelling of 55431019790 in words is "fifty-five billion, four hundred thirty-one million, nineteen thousand, seven hundred ninety".