55285646642 has 16 divisors (see below), whose sum is σ = 85791472920. Its totient is φ = 26699395968.

The previous prime is 55285646639. The next prime is 55285646651. The reversal of 55285646642 is 24664658255.

It is a Cunningham number, because it is equal to 235129²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 49470211561 + 5815435081 = 222419^2 + 76259^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2716517 + ... + 2736792.

Almost surely, 2^55285646642 is an apocalyptic number.

55285646642 is a deficient number, since it is larger than the sum of its proper divisors (30505826278).

55285646642 is a wasteful number, since it uses less digits than its factorization.

55285646642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5453485.

The product of its digits is 13824000, while the sum is 53.

The spelling of 55285646642 in words is "fifty-five billion, two hundred eighty-five million, six hundred forty-six thousand, six hundred forty-two".