54520215651 has 12 divisors (see below), whose sum is σ = 85910643000. Its totient is φ = 33042554880.

The previous prime is 54520215649. The next prime is 54520215661. The reversal of 54520215651 is 15651202545.

54520215651 is a `hidden beast` number, since 5 + 452 + 0 + 2 + 156 + 51 = 666.

It is not a de Polignac number, because 54520215651 - 2¹ = 54520215649 is a prime.

It is not an unprimeable number, because it can be changed into a prime (54520215661) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 275354526 + ... + 275354723.

It is an arithmetic number, because the mean of its divisors is an integer number (7159220250).

Almost surely, 2^54520215651 is an apocalyptic number.

54520215651 is a deficient number, since it is larger than the sum of its proper divisors (31390427349).

54520215651 is a wasteful number, since it uses less digits than its factorization.

54520215651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 550709266 (or 550709263 counting only the distinct ones).

The product of its (nonzero) digits is 60000, while the sum is 36.

The spelling of 54520215651 in words is "fifty-four billion, five hundred twenty million, two hundred fifteen thousand, six hundred fifty-one".