1656747912 has 32 divisors (see below), whose sum is σ = 4150334880. Its totient is φ = 551120640.

The previous prime is 1656747901. The next prime is 1656747919. The reversal of 1656747912 is 2197476561.

It is not an unprimeable number, because it can be changed into a prime (1656747919) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 58513 + ... + 82080.

It is an arithmetic number, because the mean of its divisors is an integer number (129697965).

Almost surely, 2^1656747912 is an apocalyptic number.

1656747912 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1656747912 is an abundant number, since it is smaller than the sum of its proper divisors (2493586968).

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

1656747912 is a wasteful number, since it uses less digits than its factorization.

1656747912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141093 (or 141089 counting only the distinct ones).

The product of its digits is 635040, while the sum is 48.

The square root of 1656747912 is about 40703.1683287677. The cubic root of 1656747912 is about 1183.2744234289.

The spelling of 1656747912 in words is "one billion, six hundred fifty-six million, seven hundred forty-seven thousand, nine hundred twelve".