55437876764309 has 4 divisors (see below), whose sum is σ = 59702328823116. Its totient is φ = 51173424705504.

The previous prime is 55437876764201. The next prime is 55437876764329. The reversal of 55437876764309 is 90346767873455.

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 34127678772100 + 21310197992209 = 5841890^2 + 4616297^2 .

It is a cyclic number.

It is not a de Polignac number, because 55437876764309 - 2³⁶ = 55369157287573 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55437876764329) 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, 2132226029384 + ... + 2132226029409.

It is an arithmetic number, because the mean of its divisors is an integer number (14925582205779).

Almost surely, 2^{55437876764309} is an apocalyptic number.

It is an amenable number.

55437876764309 is a deficient number, since it is larger than the sum of its proper divisors (4264452058807).

55437876764309 is a wasteful number, since it uses less digits than its factorization.

55437876764309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4264452058806.

The product of its (nonzero) digits is 3200601600, while the sum is 74.

The spelling of 55437876764309 in words is "fifty-five trillion, four hundred thirty-seven billion, eight hundred seventy-six million, seven hundred sixty-four thousand, three hundred nine".