16690863400 has 48 divisors (see below), whose sum is σ = 38814775740. Its totient is φ = 6674880000.

The previous prime is 16690863361. The next prime is 16690863407. The reversal of 16690863400 is 436809661.

It can be written as a sum of positive squares in 6 ways, for example, as 7744352004 + 8946511396 = 88002^2 + 94586^2 .

It is not an unprimeable number, because it can be changed into a prime (16690863407) 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, 1695292 + ... + 1705108.

Almost surely, 2^16690863400 is an apocalyptic number.

16690863400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16690863400 is an abundant number, since it is smaller than the sum of its proper divisors (22123912340).

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

16690863400 is a wasteful number, since it uses less digits than its factorization.

16690863400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18334 (or 18325 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 43.

The spelling of 16690863400 in words is "sixteen billion, six hundred ninety million, eight hundred sixty-three thousand, four hundred".