161215022546434 has 4 divisors (see below), whose sum is σ = 241822533819654. Its totient is φ = 80607511273216.

The previous prime is 161215022546411. The next prime is 161215022546503. The reversal of 161215022546434 is 434645220512161.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 154767358945809 + 6447663600625 = 12440553^2 + 2539225^2 .

It is a super-2 number, since 2×161215022546434² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40303755636607 + ... + 40303755636610.

Almost surely, 2^{161215022546434} is an apocalyptic number.

161215022546434 is a deficient number, since it is larger than the sum of its proper divisors (80607511273220).

161215022546434 is an equidigital number, since it uses as much as digits as its factorization.

161215022546434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80607511273219.

The product of its (nonzero) digits is 1382400, while the sum is 46.

The spelling of 161215022546434 in words is "one hundred sixty-one trillion, two hundred fifteen billion, twenty-two million, five hundred forty-six thousand, four hundred thirty-four".