16780093394 has 16 divisors (see below), whose sum is σ = 26342454528. Its totient is φ = 8001440832.

The previous prime is 16780093387. The next prime is 16780093427. The reversal of 16780093394 is 49339008761.

It is a super-2 number, since 2×16780093394² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 525722 + ... + 556725.

It is an arithmetic number, because the mean of its divisors is an integer number (1646403408).

Almost surely, 2^16780093394 is an apocalyptic number.

16780093394 is a deficient number, since it is larger than the sum of its proper divisors (9562361134).

16780093394 is a wasteful number, since it uses less digits than its factorization.

16780093394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1082809.

The product of its (nonzero) digits is 979776, while the sum is 50.

Adding to 16780093394 its sum of digits (50), we get a square (16780093444 = 129538²).

The spelling of 16780093394 in words is "sixteen billion, seven hundred eighty million, ninety-three thousand, three hundred ninety-four".