425706661444 has 27 divisors (see below), whose sum is σ = 751898245917. Its totient is φ = 210896597184.

The previous prime is 425706661439. The next prime is 425706661453. The reversal of 425706661444 is 444166607524.

The square root of 425706661444 is 652462.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 7501292100 + 418205369344 = 86610^2 + 646688^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 147454969 + ... + 147457855.

Almost surely, 2^425706661444 is an apocalyptic number.

425706661444 is the 652462-nd square number.

It is an amenable number.

425706661444 is a deficient number, since it is larger than the sum of its proper divisors (326191584473).

425706661444 is an frugal number, since it uses more digits than its factorization.

425706661444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6004 (or 3002 counting only the distinct ones).

The product of its (nonzero) digits is 3870720, while the sum is 49.

Multiplying 425706661444 by its sum of digits (49), we get a square (20859626410756 = 4567234²).

The spelling of 425706661444 in words is "four hundred twenty-five billion, seven hundred six million, six hundred sixty-one thousand, four hundred forty-four".