16007777028 has 18 divisors (see below), whose sum is σ = 40464103134. Its totient is φ = 5335925664.

The previous prime is 16007777003. The next prime is 16007777053. The reversal of 16007777028 is 82077770061.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (16007777003) and next prime (16007777053).

It can be written as a sum of positive squares in only one way, i.e., 15750752004 + 257025024 = 125502^2 + 16032^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 222330201 + ... + 222330272.

Almost surely, 2^16007777028 is an apocalyptic number.

16007777028 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

16007777028 is an abundant number, since it is smaller than the sum of its proper divisors (24456326106).

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

16007777028 is a wasteful number, since it uses less digits than its factorization.

16007777028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444660483 (or 444660478 counting only the distinct ones).

The product of its (nonzero) digits is 230496, while the sum is 45.

The spelling of 16007777028 in words is "sixteen billion, seven million, seven hundred seventy-seven thousand, twenty-eight".