16651201554 has 48 divisors (see below), whose sum is σ = 40106137344. Its totient is φ = 4958172000.

The previous prime is 16651201549. The next prime is 16651201559. The reversal of 16651201554 is 45510215661.

It is an interprime number because it is at equal distance from previous prime (16651201549) and next prime (16651201559).

It is not an unprimeable number, because it can be changed into a prime (16651201559) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1140472 + ... + 1154979.

It is an arithmetic number, because the mean of its divisors is an integer number (835544528).

Almost surely, 2^16651201554 is an apocalyptic number.

16651201554 is an abundant number, since it is smaller than the sum of its proper divisors (23454935790).

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

16651201554 is a wasteful number, since it uses less digits than its factorization.

16651201554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2295503 (or 2295500 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 36.

The spelling of 16651201554 in words is "sixteen billion, six hundred fifty-one million, two hundred one thousand, five hundred fifty-four".