53455177761221 has 4 divisors (see below), whose sum is σ = 53466242799744. Its totient is φ = 53444112722700.

The previous prime is 53455177761197. The next prime is 53455177761241. The reversal of 53455177761221 is 12216777155435.

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 a de Polignac number, because none of the positive numbers 2^k-53455177761221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53455177761241) 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, 5532512015 + ... + 5532521676.

It is an arithmetic number, because the mean of its divisors is an integer number (13366560699936).

Almost surely, 2^{53455177761221} is an apocalyptic number.

It is an amenable number.

53455177761221 is a deficient number, since it is larger than the sum of its proper divisors (11065038523).

53455177761221 is a wasteful number, since it uses less digits than its factorization.

53455177761221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11065038522.

The product of its digits is 12348000, while the sum is 56.

The spelling of 53455177761221 in words is "fifty-three trillion, four hundred fifty-five billion, one hundred seventy-seven million, seven hundred sixty-one thousand, two hundred twenty-one".