55551801518 has 8 divisors (see below), whose sum is σ = 83365362648. Its totient is φ = 27763347304.

The previous prime is 55551801497. The next prime is 55551801521. The reversal of 55551801518 is 81510815555.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6271196 + ... + 6280047.

It is an arithmetic number, because the mean of its divisors is an integer number (10420670331).

Almost surely, 2^55551801518 is an apocalyptic number.

55551801518 is a deficient number, since it is larger than the sum of its proper divisors (27813561130).

55551801518 is a wasteful number, since it uses less digits than its factorization.

55551801518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12553458.

The product of its (nonzero) digits is 200000, while the sum is 44.

The spelling of 55551801518 in words is "fifty-five billion, five hundred fifty-one million, eight hundred one thousand, five hundred eighteen".