54509978361 has 4 divisors (see below), whose sum is σ = 72679971152. Its totient is φ = 36339985572.

The previous prime is 54509978359. The next prime is 54509978381. The reversal of 54509978361 is 16387990545.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 54509978361 - 2¹ = 54509978359 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (54509978381) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9084996391 + ... + 9084996396.

It is an arithmetic number, because the mean of its divisors is an integer number (18169992788).

Almost surely, 2^54509978361 is an apocalyptic number.

It is an amenable number.

54509978361 is a deficient number, since it is larger than the sum of its proper divisors (18169992791).

54509978361 is a wasteful number, since it uses less digits than its factorization.

54509978361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18169992790.

The product of its (nonzero) digits is 8164800, while the sum is 57.

The spelling of 54509978361 in words is "fifty-four billion, five hundred nine million, nine hundred seventy-eight thousand, three hundred sixty-one".