54135689639761 has 4 divisors (see below), whose sum is σ = 54135833090800. Its totient is φ = 54135546188724.

The previous prime is 54135689639671. The next prime is 54135689639803. The reversal of 54135689639761 is 16793698653145.

It is a happy number.

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 a cyclic number.

It is not a de Polignac number, because 54135689639761 - 2¹¹ = 54135689637713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (54135689619761) 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, 71157951 + ... + 71914708.

It is an arithmetic number, because the mean of its divisors is an integer number (13533958272700).

Almost surely, 2^{54135689639761} is an apocalyptic number.

It is an amenable number.

54135689639761 is a deficient number, since it is larger than the sum of its proper divisors (143451039).

54135689639761 is a wasteful number, since it uses less digits than its factorization.

54135689639761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143451038.

The product of its digits is 881798400, while the sum is 73.

The spelling of 54135689639761 in words is "fifty-four trillion, one hundred thirty-five billion, six hundred eighty-nine million, six hundred thirty-nine thousand, seven hundred sixty-one".