55405532747 has 4 divisors (see below), whose sum is σ = 56902979616. Its totient is φ = 53908085880.

The previous prime is 55405532729. The next prime is 55405532789. The reversal of 55405532747 is 74723550455.

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 55405532747 - 2²⁴ = 55388755531 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55405534747) 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, 748723379 + ... + 748723452.

It is an arithmetic number, because the mean of its divisors is an integer number (14225744904).

Almost surely, 2^55405532747 is an apocalyptic number.

55405532747 is a deficient number, since it is larger than the sum of its proper divisors (1497446869).

55405532747 is a wasteful number, since it uses less digits than its factorization.

55405532747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1497446868.

The product of its (nonzero) digits is 2940000, while the sum is 47.

The spelling of 55405532747 in words is "fifty-five billion, four hundred five million, five hundred thirty-two thousand, seven hundred forty-seven".