54720399956 has 6 divisors (see below), whose sum is σ = 95760699930. Its totient is φ = 27360199976.

The previous prime is 54720399911. The next prime is 54720399959. The reversal of 54720399956 is 65999302745.

54720399956 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 53299109956 + 1421290000 = 230866^2 + 37700^2 .

It is a junction number, because it is equal to n+sod(n) for n = 54720399895 and 54720399904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54720399959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6840049991 + ... + 6840049998.

It is an arithmetic number, because the mean of its divisors is an integer number (15960116655).

Almost surely, 2^54720399956 is an apocalyptic number.

It is an amenable number.

54720399956 is a deficient number, since it is larger than the sum of its proper divisors (41040299974).

54720399956 is a wasteful number, since it uses less digits than its factorization.

54720399956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13680099993 (or 13680099991 counting only the distinct ones).

The product of its (nonzero) digits is 18370800, while the sum is 59.

The spelling of 54720399956 in words is "fifty-four billion, seven hundred twenty million, three hundred ninety-nine thousand, nine hundred fifty-six".