1656155406 has 32 divisors (see below), whose sum is σ = 3567738240. Its totient is φ = 510832224.

The previous prime is 1656155383. The next prime is 1656155407. The reversal of 1656155406 is 6045516561.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1656155407) 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 15 ways as a sum of consecutive naturals, for example, 164025 + ... + 173828.

It is an arithmetic number, because the mean of its divisors is an integer number (111491820).

Almost surely, 2^1656155406 is an apocalyptic number.

1656155406 is an abundant number, since it is smaller than the sum of its proper divisors (1911582834).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1656155406 is a wasteful number, since it uses less digits than its factorization.

1656155406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 337920.

The product of its (nonzero) digits is 108000, while the sum is 39.

The square root of 1656155406 is about 40695.8893010093. The cubic root of 1656155406 is about 1183.1333476935.

It can be divided in two parts, 1656155 and 406, that added together give a palindrome (1656561).

The spelling of 1656155406 in words is "one billion, six hundred fifty-six million, one hundred fifty-five thousand, four hundred six".