2154556537418 has 8 divisors (see below), whose sum is σ = 3231910555812. Its totient is φ = 1077253018816.

The previous prime is 2154556537403. The next prime is 2154556537547. The reversal of 2154556537418 is 8147356554512.

It can be written as a sum of positive squares in 2 ways, for example, as 1799308352689 + 355248184729 = 1341383^2 + 596027^2 .

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

It is a super-2 number, since 2×2154556537418² (a number of 25 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 in 3 ways as a sum of consecutive naturals, for example, 12518105 + ... + 12689052.

Almost surely, 2^{2154556537418} is an apocalyptic number.

2154556537418 is a deficient number, since it is larger than the sum of its proper divisors (1077354018394).

2154556537418 is a wasteful number, since it uses less digits than its factorization.

2154556537418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25249896.

The product of its digits is 20160000, while the sum is 56.

The spelling of 2154556537418 in words is "two trillion, one hundred fifty-four billion, five hundred fifty-six million, five hundred thirty-seven thousand, four hundred eighteen".