16477720775231 has 2 divisors, whose sum is σ = 16477720775232. Its totient is φ = 16477720775230.

The previous prime is 16477720775221. The next prime is 16477720775249. The reversal of 16477720775231 is 13257702777461.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16477720775231 - 2⁶ = 16477720775167 is a prime.

It is a super-2 number, since 2×16477720775231² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16477720775221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8238860387615 + 8238860387616.

It is an arithmetic number, because the mean of its divisors is an integer number (8238860387616).

Almost surely, 2^{16477720775231} is an apocalyptic number.

16477720775231 is a deficient number, since it is larger than the sum of its proper divisors (1).

16477720775231 is an equidigital number, since it uses as much as digits as its factorization.

16477720775231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24202080, while the sum is 59.

The spelling of 16477720775231 in words is "sixteen trillion, four hundred seventy-seven billion, seven hundred twenty million, seven hundred seventy-five thousand, two hundred thirty-one".