55421366312455 has 128 divisors (see below), whose sum is σ = 82820293678080. Its totient is φ = 35001450639360.

The previous prime is 55421366312381. The next prime is 55421366312461.

55421366312455 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 55421366312455 - 2⁹ = 55421366311943 is a prime.

It is a super-3 number, since 3×55421366312455³ (a number of 42 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 2739147019 + ... + 2739167251.

It is an arithmetic number, because the mean of its divisors is an integer number (647033544360).

Almost surely, 2^{55421366312455} is an apocalyptic number.

55421366312455 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

55421366312455 is a deficient number, since it is larger than the sum of its proper divisors (27398927365625).

55421366312455 is a wasteful number, since it uses less digits than its factorization.

55421366312455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21681.

The product of its digits is 12960000, while the sum is 52.

The spelling of 55421366312455 in words is "fifty-five trillion, four hundred twenty-one billion, three hundred sixty-six million, three hundred twelve thousand, four hundred fifty-five".