55447643787 has 8 divisors (see below), whose sum is σ = 75142162320. Its totient is φ = 36359110560.

The previous prime is 55447643761. The next prime is 55447643803. The reversal of 55447643787 is 78734674455.

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

It is not a de Polignac number, because 55447643787 - 2¹⁰ = 55447642763 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55447643787.

It is not an unprimeable number, because it can be changed into a prime (55447643087) 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, 151496112 + ... + 151496477.

It is an arithmetic number, because the mean of its divisors is an integer number (9392770290).

Almost surely, 2^55447643787 is an apocalyptic number.

55447643787 is a deficient number, since it is larger than the sum of its proper divisors (19694518533).

55447643787 is a wasteful number, since it uses less digits than its factorization.

55447643787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302992653.

The product of its digits is 79027200, while the sum is 60.

The spelling of 55447643787 in words is "fifty-five billion, four hundred forty-seven million, six hundred forty-three thousand, seven hundred eighty-seven".