1645741232656 has 10 divisors (see below), whose sum is σ = 3188623638302. Its totient is φ = 822870616320.

The previous prime is 1645741232621. The next prime is 1645741232657. The reversal of 1645741232656 is 6562321475461.

It can be written as a sum of positive squares in only one way, i.e., 1140624000000 + 505117232656 = 1068000^2 + 710716^2 .

It is not an unprimeable number, because it can be changed into a prime (1645741232657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51429413505 + ... + 51429413536.

Almost surely, 2^{1645741232656} is an apocalyptic number.

1645741232656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1645741232656 is a deficient number, since it is larger than the sum of its proper divisors (1542882405646).

1645741232656 is a wasteful number, since it uses less digits than its factorization.

1645741232656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102858827049 (or 102858827043 counting only the distinct ones).

The product of its digits is 7257600, while the sum is 52.

The spelling of 1645741232656 in words is "one trillion, six hundred forty-five billion, seven hundred forty-one million, two hundred thirty-two thousand, six hundred fifty-six".