16623647748 has 18 divisors (see below), whose sum is σ = 42020887454. Its totient is φ = 5541215904.

The previous prime is 16623647717. The next prime is 16623647771. The reversal of 16623647748 is 84774632661.

16623647748 is a `hidden beast` number, since 1 + 6 + 623 + 6 + 4 + 7 + 7 + 4 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 12045501504 + 4578146244 = 109752^2 + 67662^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a junction number, because it is equal to n+sod(n) for n = 16623647694 and 16623647703.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 230883961 + ... + 230884032.

Almost surely, 2^16623647748 is an apocalyptic number.

16623647748 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

16623647748 is an abundant number, since it is smaller than the sum of its proper divisors (25397239706).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16623647748 is a wasteful number, since it uses less digits than its factorization.

16623647748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 461768003 (or 461767998 counting only the distinct ones).

The product of its digits is 8128512, while the sum is 54.

The spelling of 16623647748 in words is "sixteen billion, six hundred twenty-three million, six hundred forty-seven thousand, seven hundred forty-eight".