55135162621 has 24 divisors (see below), whose sum is σ = 69305001920. Its totient is φ = 42934985280.

The previous prime is 55135162619. The next prime is 55135162627. The reversal of 55135162621 is 12626153155.

It is a happy number.

It is not a de Polignac number, because 55135162621 - 2¹ = 55135162619 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55135162627) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1358065 + ... + 1398073.

Almost surely, 2^55135162621 is an apocalyptic number.

It is an amenable number.

55135162621 is a deficient number, since it is larger than the sum of its proper divisors (14169839299).

55135162621 is a wasteful number, since it uses less digits than its factorization.

55135162621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41665 (or 41654 counting only the distinct ones).

The product of its digits is 54000, while the sum is 37.

The spelling of 55135162621 in words is "fifty-five billion, one hundred thirty-five million, one hundred sixty-two thousand, six hundred twenty-one".