16157220668 has 6 divisors (see below), whose sum is σ = 28275136176. Its totient is φ = 8078610332.

The previous prime is 16157220641. The next prime is 16157220671. The reversal of 16157220668 is 86602275161.

It is a super-2 number, since 2×16157220668² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2019652580 + ... + 2019652587.

It is an arithmetic number, because the mean of its divisors is an integer number (4712522696).

Almost surely, 2^16157220668 is an apocalyptic number.

It is an amenable number.

16157220668 is a deficient number, since it is larger than the sum of its proper divisors (12117915508).

16157220668 is a wasteful number, since it uses less digits than its factorization.

16157220668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4039305171 (or 4039305169 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 44.

The spelling of 16157220668 in words is "sixteen billion, one hundred fifty-seven million, two hundred twenty thousand, six hundred sixty-eight".