55506649531 has 2 divisors, whose sum is σ = 55506649532. Its totient is φ = 55506649530.

The previous prime is 55506649483. The next prime is 55506649537. The reversal of 55506649531 is 13594660555.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55506649531 is a prime.

It is a super-2 number, since 2×55506649531² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (55506649537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27753324765 + 27753324766.

It is an arithmetic number, because the mean of its divisors is an integer number (27753324766).

Almost surely, 2^55506649531 is an apocalyptic number.

55506649531 is a deficient number, since it is larger than the sum of its proper divisors (1).

55506649531 is an equidigital number, since it uses as much as digits as its factorization.

55506649531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2430000, while the sum is 49.

The spelling of 55506649531 in words is "fifty-five billion, five hundred six million, six hundred forty-nine thousand, five hundred thirty-one".