555135978109 has 4 divisors (see below), whose sum is σ = 555142236220. Its totient is φ = 555129720000.

The previous prime is 555135978101. The next prime is 555135978113. The reversal of 555135978109 is 901879531555.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 516170402500 + 38965575609 = 718450^2 + 197397^2 .

It is a cyclic number.

It is not a de Polignac number, because 555135978109 - 2³ = 555135978101 is a prime.

It is a super-2 number, since 2×555135978109² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (555135978101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2994054 + ... + 3174055.

It is an arithmetic number, because the mean of its divisors is an integer number (138785559055).

Almost surely, 2^555135978109 is an apocalyptic number.

It is an amenable number.

555135978109 is a deficient number, since it is larger than the sum of its proper divisors (6258111).

555135978109 is an equidigital number, since it uses as much as digits as its factorization.

555135978109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6258110.

The product of its (nonzero) digits is 8505000, while the sum is 58.

The spelling of 555135978109 in words is "five hundred fifty-five billion, one hundred thirty-five million, nine hundred seventy-eight thousand, one hundred nine".