1656555516055 has 72 divisors (see below), whose sum is σ = 2240723958480. Its totient is φ = 1174795776000.

The previous prime is 1656555516043. The next prime is 1656555516061. The reversal of 1656555516055 is 5506155556561.

It is not a de Polignac number, because 1656555516055 - 2²³ = 1656547127447 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (55).

It is a junction number, because it is equal to n+sod(n) for n = 1656555515987 and 1656555516005.

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 71 ways as a sum of consecutive naturals, for example, 1175695191 + ... + 1175696599.

It is an arithmetic number, because the mean of its divisors is an integer number (31121166090).

Almost surely, 2^{1656555516055} is an apocalyptic number.

1656555516055 is a deficient number, since it is larger than the sum of its proper divisors (584168442425).

1656555516055 is a wasteful number, since it uses less digits than its factorization.

1656555516055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2573 (or 2519 counting only the distinct ones).

The product of its (nonzero) digits is 16875000, while the sum is 55.

The spelling of 1656555516055 in words is "one trillion, six hundred fifty-six billion, five hundred fifty-five million, five hundred sixteen thousand, fifty-five".