855638547 has 8 divisors (see below), whose sum is σ = 1149059520. Its totient is φ = 566321640.

The previous prime is 855638507. The next prime is 855638561. The reversal of 855638547 is 745836558.

It is a happy number.

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

It is not a de Polignac number, because 855638547 - 2¹⁹ = 855114259 is a prime.

It is a super-2 number, since 2×855638547² = 1464234646224542418, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 855638547.

It is not an unprimeable number, because it can be changed into a prime (855638507) 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, 1025529 + ... + 1026362.

It is an arithmetic number, because the mean of its divisors is an integer number (143632440).

Almost surely, 2^855638547 is an apocalyptic number.

855638547 is a deficient number, since it is larger than the sum of its proper divisors (293420973).

855638547 is a wasteful number, since it uses less digits than its factorization.

855638547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2052033.

The product of its digits is 4032000, while the sum is 51.

The square root of 855638547 is about 29251.2999198326. The cubic root of 855638547 is about 949.3582173193.

The spelling of 855638547 in words is "eight hundred fifty-five million, six hundred thirty-eight thousand, five hundred forty-seven".