161803276427 has 16 divisors (see below), whose sum is σ = 175548764160. Its totient is φ = 148245012000.

The previous prime is 161803276417. The next prime is 161803276433. The reversal of 161803276427 is 724672308161.

It is a cyclic number.

It is not a de Polignac number, because 161803276427 - 2¹⁸ = 161803014283 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161803276417) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2382974 + ... + 2449932.

It is an arithmetic number, because the mean of its divisors is an integer number (10971797760).

Almost surely, 2^161803276427 is an apocalyptic number.

161803276427 is a deficient number, since it is larger than the sum of its proper divisors (13745487733).

161803276427 is a wasteful number, since it uses less digits than its factorization.

161803276427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68354.

The product of its (nonzero) digits is 677376, while the sum is 47.

The spelling of 161803276427 in words is "one hundred sixty-one billion, eight hundred three million, two hundred seventy-six thousand, four hundred twenty-seven".