55857717998 has 16 divisors (see below), whose sum is σ = 86071098960. Its totient is φ = 27167702976.

The previous prime is 55857717983. The next prime is 55857718067. The reversal of 55857717998 is 89971775855.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 240665 + ... + 411867.

It is an arithmetic number, because the mean of its divisors is an integer number (5379443685).

Almost surely, 2^55857717998 is an apocalyptic number.

55857717998 is a deficient number, since it is larger than the sum of its proper divisors (30213380962).

55857717998 is a wasteful number, since it uses less digits than its factorization.

55857717998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175651.

The product of its digits is 222264000, while the sum is 71.

The spelling of 55857717998 in words is "fifty-five billion, eight hundred fifty-seven million, seven hundred seventeen thousand, nine hundred ninety-eight".