54511615010521 has 4 divisors (see below), whose sum is σ = 54708407844772. Its totient is φ = 54314822176272.

The previous prime is 54511615010513. The next prime is 54511615010537. The reversal of 54511615010521 is 12501051611545.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7287780768921 + 47223834241600 = 2699589^2 + 6871960^2 .

It is a cyclic number.

It is not a de Polignac number, because 54511615010521 - 2³ = 54511615010513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (54511615017521) 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, 98396416710 + ... + 98396417263.

It is an arithmetic number, because the mean of its divisors is an integer number (13677101961193).

Almost surely, 2^{54511615010521} is an apocalyptic number.

It is an amenable number.

54511615010521 is a deficient number, since it is larger than the sum of its proper divisors (196792834251).

54511615010521 is a wasteful number, since it uses less digits than its factorization.

54511615010521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196792834250.

The product of its (nonzero) digits is 30000, while the sum is 37.

The spelling of 54511615010521 in words is "fifty-four trillion, five hundred eleven billion, six hundred fifteen million, ten thousand, five hundred twenty-one".