55400211515 has 8 divisors (see below), whose sum is σ = 72523913328. Its totient is φ = 40291062880.

The previous prime is 55400211487. The next prime is 55400211521. The reversal of 55400211515 is 51511200455.

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

It is not a de Polignac number, because 55400211515 - 2²⁶ = 55333102651 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 503638232 + ... + 503638341.

It is an arithmetic number, because the mean of its divisors is an integer number (9065489166).

Almost surely, 2^55400211515 is an apocalyptic number.

55400211515 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

55400211515 is a deficient number, since it is larger than the sum of its proper divisors (17123701813).

55400211515 is a wasteful number, since it uses less digits than its factorization.

55400211515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1007276589.

The product of its (nonzero) digits is 5000, while the sum is 29.

The spelling of 55400211515 in words is "fifty-five billion, four hundred million, two hundred eleven thousand, five hundred fifteen".