2161331277554 has 8 divisors (see below), whose sum is σ = 3412628333040. Its totient is φ = 1023788499876.

The previous prime is 2161331277551. The next prime is 2161331277619. The reversal of 2161331277554 is 4557721331612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×2161331277554³ (a number of 38 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2161331277499 and 2161331277508.

It is not an unprimeable number, because it can be changed into a prime (2161331277551) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 28438569404 + ... + 28438569479.

It is an arithmetic number, because the mean of its divisors is an integer number (426578541630).

Almost surely, 2^{2161331277554} is an apocalyptic number.

2161331277554 is a deficient number, since it is larger than the sum of its proper divisors (1251297055486).

2161331277554 is a wasteful number, since it uses less digits than its factorization.

2161331277554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56877138904.

The product of its digits is 1058400, while the sum is 47.

The spelling of 2161331277554 in words is "two trillion, one hundred sixty-one billion, three hundred thirty-one million, two hundred seventy-seven thousand, five hundred fifty-four".