55505050397 has 16 divisors (see below), whose sum is σ = 57392375040. Its totient is φ = 53645443200.

The previous prime is 55505050387. The next prime is 55505050477. The reversal of 55505050397 is 79305050555.

It is a cyclic number.

It is not a de Polignac number, because 55505050397 - 2¹⁶ = 55504984861 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 (55505050327) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1937504 + ... + 1965942.

It is an arithmetic number, because the mean of its divisors is an integer number (3587023440).

Almost surely, 2^55505050397 is an apocalyptic number.

It is an amenable number.

55505050397 is a deficient number, since it is larger than the sum of its proper divisors (1887324643).

55505050397 is a wasteful number, since it uses less digits than its factorization.

55505050397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28924.

The product of its (nonzero) digits is 590625, while the sum is 44.

The spelling of 55505050397 in words is "fifty-five billion, five hundred five million, fifty thousand, three hundred ninety-seven".