161426644555 has 32 divisors (see below), whose sum is σ = 211890712320. Its totient is φ = 117085783680.

The previous prime is 161426644537. The next prime is 161426644583. The reversal of 161426644555 is 555446624161.

It is not a de Polignac number, because 161426644555 - 2¹³ = 161426636363 is a prime.

It is a super-2 number, since 2×161426644555² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 161426644499 and 161426644508.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 42445284 + ... + 42449086.

It is an arithmetic number, because the mean of its divisors is an integer number (6621584760).

Almost surely, 2^161426644555 is an apocalyptic number.

161426644555 is a deficient number, since it is larger than the sum of its proper divisors (50464067765).

161426644555 is a wasteful number, since it uses less digits than its factorization.

161426644555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5691.

The product of its digits is 3456000, while the sum is 49.

The spelling of 161426644555 in words is "one hundred sixty-one billion, four hundred twenty-six million, six hundred forty-four thousand, five hundred fifty-five".