55434540152421 has 48 divisors (see below), whose sum is σ = 82023324881472. Its totient is φ = 36063555091200.

The previous prime is 55434540152401. The next prime is 55434540152423. The reversal of 55434540152421 is 12425104543455.

55434540152421 is a `hidden beast` number, since 5 + 5 + 4 + 3 + 454 + 0 + 152 + 42 + 1 = 666.

It is not a de Polignac number, because 55434540152421 - 2¹¹ = 55434540150373 is a prime.

It is a super-2 number, since 2×55434540152421² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55434540152423) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 153910681 + ... + 154270433.

It is an arithmetic number, because the mean of its divisors is an integer number (1708819268364).

Almost surely, 2^{55434540152421} is an apocalyptic number.

It is an amenable number.

55434540152421 is a deficient number, since it is larger than the sum of its proper divisors (26588784729051).

55434540152421 is a wasteful number, since it uses less digits than its factorization.

55434540152421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361554 (or 361551 counting only the distinct ones).

The product of its (nonzero) digits is 1920000, while the sum is 45.

Adding to 55434540152421 its reverse (12425104543455), we get a palindrome (67859644695876).

The spelling of 55434540152421 in words is "fifty-five trillion, four hundred thirty-four billion, five hundred forty million, one hundred fifty-two thousand, four hundred twenty-one".