2154777455 has 8 divisors (see below), whose sum is σ = 2737834992. Its totient is φ = 1622420608.

The previous prime is 2154777439. The next prime is 2154777539. The reversal of 2154777455 is 5547774512.

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

It is a cyclic number.

It is not a de Polignac number, because 2154777455 - 2⁴ = 2154777439 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12675077 + ... + 12675246.

It is an arithmetic number, because the mean of its divisors is an integer number (342229374).

Almost surely, 2^2154777455 is an apocalyptic number.

2154777455 is a deficient number, since it is larger than the sum of its proper divisors (583057537).

2154777455 is a wasteful number, since it uses less digits than its factorization.

2154777455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25350345.

The product of its digits is 1372000, while the sum is 47.

The square root of 2154777455 is about 46419.5805129689. The cubic root of 2154777455 is about 1291.6181554494.

The spelling of 2154777455 in words is "two billion, one hundred fifty-four million, seven hundred seventy-seven thousand, four hundred fifty-five".