55181203942 has 4 divisors (see below), whose sum is σ = 82771805916. Its totient is φ = 27590601970.

The previous prime is 55181203939. The next prime is 55181203993. The reversal of 55181203942 is 24930218155.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 55181203895 and 55181203904.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 13795300984 + ... + 13795300987.

It is an arithmetic number, because the mean of its divisors is an integer number (20692951479).

Almost surely, 2^55181203942 is an apocalyptic number.

55181203942 is a deficient number, since it is larger than the sum of its proper divisors (27590601974).

55181203942 is a wasteful number, since it uses less digits than its factorization.

55181203942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27590601973.

The product of its (nonzero) digits is 86400, while the sum is 40.

The spelling of 55181203942 in words is "fifty-five billion, one hundred eighty-one million, two hundred three thousand, nine hundred forty-two".