55521172463 has 2 divisors, whose sum is σ = 55521172464. Its totient is φ = 55521172462.

The previous prime is 55521172397. The next prime is 55521172471. The reversal of 55521172463 is 36427112555.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55521172463 - 2²² = 55516978159 is a prime.

It is a super-3 number, since 3×55521172463³ (a number of 33 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 55521172463.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55521172493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27760586231 + 27760586232.

It is an arithmetic number, because the mean of its divisors is an integer number (27760586232).

Almost surely, 2^55521172463 is an apocalyptic number.

55521172463 is a deficient number, since it is larger than the sum of its proper divisors (1).

55521172463 is an equidigital number, since it uses as much as digits as its factorization.

55521172463 is an evil number, because the sum of its binary digits is even.

The product of its digits is 252000, while the sum is 41.

The spelling of 55521172463 in words is "fifty-five billion, five hundred twenty-one million, one hundred seventy-two thousand, four hundred sixty-three".