2154457646 has 8 divisors (see below), whose sum is σ = 3525476184. Its totient is φ = 979298920.

The previous prime is 2154457639. The next prime is 2154457673. The reversal of 2154457646 is 6467544512.

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

It is a super-2 number, since 2×2154457646² = 9283375496815722632, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2154457597 and 2154457606.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48964925 + ... + 48964968.

It is an arithmetic number, because the mean of its divisors is an integer number (440684523).

Almost surely, 2^2154457646 is an apocalyptic number.

2154457646 is a deficient number, since it is larger than the sum of its proper divisors (1371018538).

2154457646 is a wasteful number, since it uses less digits than its factorization.

2154457646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97929906.

The product of its digits is 806400, while the sum is 44.

The square root of 2154457646 is about 46416.1356211393. The cubic root of 2154457646 is about 1291.5542522457.

The spelling of 2154457646 in words is "two billion, one hundred fifty-four million, four hundred fifty-seven thousand, six hundred forty-six".