16557947354 has 24 divisors (see below), whose sum is σ = 27638149140. Its totient is φ = 7395598080.

The previous prime is 16557947327. The next prime is 16557947359. The reversal of 16557947354 is 45374975561.

It can be written as a sum of positive squares in 2 ways, for example, as 16415503129 + 142444225 = 128123^2 + 11935^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 16557947354.

It is not an unprimeable number, because it can be changed into a prime (16557947359) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 306359 + ... + 356330.

Almost surely, 2^16557947354 is an apocalyptic number.

16557947354 is a deficient number, since it is larger than the sum of its proper divisors (11080201786).

16557947354 is a wasteful number, since it uses less digits than its factorization.

16557947354 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 662766 (or 662735 counting only the distinct ones).

The product of its digits is 15876000, while the sum is 56.

The spelling of 16557947354 in words is "sixteen billion, five hundred fifty-seven million, nine hundred forty-seven thousand, three hundred fifty-four".