55540870901 has 4 divisors (see below), whose sum is σ = 58807980972. Its totient is φ = 52273760832.

The previous prime is 55540870871. The next prime is 55540870919. The reversal of 55540870901 is 10907804555.

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 34373530801 + 21167340100 = 185401^2 + 145490^2 .

It is a cyclic number.

It is not a de Polignac number, because 55540870901 - 2¹⁰ = 55540869877 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 (55540870951) 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, 1633555010 + ... + 1633555043.

It is an arithmetic number, because the mean of its divisors is an integer number (14701995243).

Almost surely, 2^55540870901 is an apocalyptic number.

It is an amenable number.

55540870901 is a deficient number, since it is larger than the sum of its proper divisors (3267110071).

55540870901 is a wasteful number, since it uses less digits than its factorization.

55540870901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3267110070.

The product of its (nonzero) digits is 252000, while the sum is 44.

The spelling of 55540870901 in words is "fifty-five billion, five hundred forty million, eight hundred seventy thousand, nine hundred one".