1656655051 has 4 divisors (see below), whose sum is σ = 1667207152. Its totient is φ = 1646102952.

The previous prime is 1656655031. The next prime is 1656655081. The reversal of 1656655051 is 1505566561.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1656655051 - 2¹⁵ = 1656622283 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1656654995 and 1656655013.

It is not an unprimeable number, because it can be changed into a prime (1656655031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5275815 + ... + 5276128.

It is an arithmetic number, because the mean of its divisors is an integer number (416801788).

Almost surely, 2^1656655051 is an apocalyptic number.

1656655051 is a deficient number, since it is larger than the sum of its proper divisors (10552101).

1656655051 is a wasteful number, since it uses less digits than its factorization.

1656655051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10552100.

The product of its (nonzero) digits is 135000, while the sum is 40.

The square root of 1656655051 is about 40702.0276030568. The cubic root of 1656655051 is about 1183.2523154389.

It can be divided in two parts, 16566 and 55051, that added together give a palindrome (71617).

The spelling of 1656655051 in words is "one billion, six hundred fifty-six million, six hundred fifty-five thousand, fifty-one".