16780715652 has 12 divisors (see below), whose sum is σ = 39155003216. Its totient is φ = 5593571880.

The previous prime is 16780715629. The next prime is 16780715671. The reversal of 16780715652 is 25651708761.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 699196474 + ... + 699196497.

Almost surely, 2^16780715652 is an apocalyptic number.

16780715652 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

16780715652 is an abundant number, since it is smaller than the sum of its proper divisors (22374287564).

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

16780715652 is a wasteful number, since it uses less digits than its factorization.

16780715652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1398392978 (or 1398392976 counting only the distinct ones).

The product of its (nonzero) digits is 705600, while the sum is 48.

The spelling of 16780715652 in words is "sixteen billion, seven hundred eighty million, seven hundred fifteen thousand, six hundred fifty-two".