55550554987 has 32 divisors (see below), whose sum is σ = 59393777472. Its totient is φ = 51885909504.

The previous prime is 55550554963. The next prime is 55550555003. The reversal of 55550554987 is 78945505555.

It is a cyclic number.

It is not a de Polignac number, because 55550554987 - 2¹⁹ = 55550030699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55550554387) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20626413 + ... + 20629105.

It is an arithmetic number, because the mean of its divisors is an integer number (1856055546).

Almost surely, 2^55550554987 is an apocalyptic number.

55550554987 is a deficient number, since it is larger than the sum of its proper divisors (3843222485).

55550554987 is a wasteful number, since it uses less digits than its factorization.

55550554987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3007.

The product of its (nonzero) digits is 31500000, while the sum is 58.

The spelling of 55550554987 in words is "fifty-five billion, five hundred fifty million, five hundred fifty-four thousand, nine hundred eighty-seven".