1554556554551 has 96 divisors (see below), whose sum is σ = 2234078246400. Its totient is φ = 1049578041600.

The previous prime is 1554556554539. The next prime is 1554556554571.

1554556554551 is nontrivially palindromic in base 10.

It is a de Polignac number, because none of the positive numbers 2^k-1554556554551 is a prime.

It is a hoax number, since the sum of its digits (56) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1554556554511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 22769696 + ... + 22837866.

It is an arithmetic number, because the mean of its divisors is an integer number (23271648400).

Almost surely, 2^{1554556554551} is an apocalyptic number.

1554556554551 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1554556554551 is a deficient number, since it is larger than the sum of its proper divisors (679521691849).

1554556554551 is a wasteful number, since it uses less digits than its factorization.

1554556554551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68341 (or 68330 counting only the distinct ones).

The product of its digits is 37500000, while the sum is 56.

The spelling of 1554556554551 in words is "one trillion, five hundred fifty-four billion, five hundred fifty-six million, five hundred fifty-four thousand, five hundred fifty-one".