5551891957436 has 48 divisors (see below), whose sum is σ = 10846375507968. Its totient is φ = 2464713014400.

The previous prime is 5551891957429. The next prime is 5551891957441. The reversal of 5551891957436 is 6347591981555.

It is a congruent number.

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 26654816 + ... + 26862296.

It is an arithmetic number, because the mean of its divisors is an integer number (225966156416).

Almost surely, 2^{5551891957436} is an apocalyptic number.

It is an amenable number.

5551891957436 is a deficient number, since it is larger than the sum of its proper divisors (5294483550532).

5551891957436 is a wasteful number, since it uses less digits than its factorization.

5551891957436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221682 (or 221680 counting only the distinct ones).

The product of its digits is 204120000, while the sum is 68.

The spelling of 5551891957436 in words is "five trillion, five hundred fifty-one billion, eight hundred ninety-one million, nine hundred fifty-seven thousand, four hundred thirty-six".