55145611421 has 8 divisors (see below), whose sum is σ = 56973151488. Its totient is φ = 53321112000.

The previous prime is 55145611399. The next prime is 55145611459. The reversal of 55145611421 is 12411654155.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55145611421 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55145691421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 723260 + ... + 795861.

It is an arithmetic number, because the mean of its divisors is an integer number (7121643936).

Almost surely, 2^55145611421 is an apocalyptic number.

It is an amenable number.

55145611421 is a deficient number, since it is larger than the sum of its proper divisors (1827540067).

55145611421 is a wasteful number, since it uses less digits than its factorization.

55145611421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1520323.

The product of its digits is 24000, while the sum is 35.

The spelling of 55145611421 in words is "fifty-five billion, one hundred forty-five million, six hundred eleven thousand, four hundred twenty-one".