55971946558 has 16 divisors (see below), whose sum is σ = 91623234816. Its totient is φ = 25432689240.

The previous prime is 55971946543. The next prime is 55971946559. The reversal of 55971946558 is 85564917955.

It is a self number, because there is not a number n which added to its sum of digits gives 55971946558.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55971946559) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 392166 + ... + 515497.

It is an arithmetic number, because the mean of its divisors is an integer number (5726452176).

Almost surely, 2^55971946558 is an apocalyptic number.

55971946558 is a deficient number, since it is larger than the sum of its proper divisors (35651288258).

55971946558 is a wasteful number, since it uses less digits than its factorization.

55971946558 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 910479.

The product of its digits is 68040000, while the sum is 64.

The spelling of 55971946558 in words is "fifty-five billion, nine hundred seventy-one million, nine hundred forty-six thousand, five hundred fifty-eight".