55990887347 has 4 divisors (see below), whose sum is σ = 56514166776. Its totient is φ = 55467607920.

The previous prime is 55990887343. The next prime is 55990887349. The reversal of 55990887347 is 74378809955.

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

It is a cyclic number.

It is not a de Polignac number, because 55990887347 - 2² = 55990887343 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55990887343) 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, 261639554 + ... + 261639767.

It is an arithmetic number, because the mean of its divisors is an integer number (14128541694).

Almost surely, 2^55990887347 is an apocalyptic number.

55990887347 is a deficient number, since it is larger than the sum of its proper divisors (523279429).

55990887347 is a wasteful number, since it uses less digits than its factorization.

55990887347 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 523279428.

The product of its (nonzero) digits is 76204800, while the sum is 65.

The spelling of 55990887347 in words is "fifty-five billion, nine hundred ninety million, eight hundred eighty-seven thousand, three hundred forty-seven".