228640620550 has 48 divisors (see below), whose sum is σ = 429553792512. Its totient is φ = 90535975200.

The previous prime is 228640620517. The next prime is 228640620553. The reversal of 228640620550 is 55026046822.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228640620553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18693537 + ... + 18705763.

It is an arithmetic number, because the mean of its divisors is an integer number (8949037344).

Almost surely, 2^228640620550 is an apocalyptic number.

228640620550 is a deficient number, since it is larger than the sum of its proper divisors (200913171962).

228640620550 is a wasteful number, since it uses less digits than its factorization.

228640620550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15973 (or 15968 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 40.

The spelling of 228640620550 in words is "two hundred twenty-eight billion, six hundred forty million, six hundred twenty thousand, five hundred fifty".