54891816 has 32 divisors (see below), whose sum is σ = 156834240. Its totient is φ = 15683328.

The previous prime is 54891803. The next prime is 54891841. The reversal of 54891816 is 61819845.

It is a super-2 number, since 2×54891816² = 6026222927555712, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 163201 + ... + 163536.

It is an arithmetic number, because the mean of its divisors is an integer number (4901070).

Almost surely, 2^54891816 is an apocalyptic number.

54891816 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

54891816 is an abundant number, since it is smaller than the sum of its proper divisors (101942424).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

54891816 is a wasteful number, since it uses less digits than its factorization.

54891816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326753 (or 326749 counting only the distinct ones).

The product of its digits is 69120, while the sum is 42.

The square root of 54891816 is about 7408.9011330966. The cubic root of 54891816 is about 380.0457378003.

The spelling of 54891816 in words is "fifty-four million, eight hundred ninety-one thousand, eight hundred sixteen".