16398552550 has 12 divisors (see below), whose sum is σ = 30501307836. Its totient is φ = 6559421000.

The previous prime is 16398552487. The next prime is 16398552553. The reversal of 16398552550 is 5525589361.

It is a super-2 number, since 2×16398552550² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 16398552494 and 16398552503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16398552553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 163985476 + ... + 163985575.

It is an arithmetic number, because the mean of its divisors is an integer number (2541775653).

Almost surely, 2^16398552550 is an apocalyptic number.

16398552550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16398552550 is a deficient number, since it is larger than the sum of its proper divisors (14102755286).

16398552550 is a wasteful number, since it uses less digits than its factorization.

16398552550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327971063 (or 327971058 counting only the distinct ones).

The product of its (nonzero) digits is 1620000, while the sum is 49.

The spelling of 16398552550 in words is "sixteen billion, three hundred ninety-eight million, five hundred fifty-two thousand, five hundred fifty".