1655254645489 has 9 divisors (see below), whose sum is σ = 1667602561611. Its totient is φ = 1642997521680.

The previous prime is 1655254645439. The next prime is 1655254645493. The reversal of 1655254645489 is 9845464525561.

The square root of 1655254645489 is 1286567.

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., 972304463025 + 682950182464 = 986055^2 + 826408^2 .

It is not a de Polignac number, because 1655254645489 - 2⁹ = 1655254644977 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1655254645489.

It is not an unprimeable number, because it can be changed into a prime (1655254645409) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 176254984 + ... + 176264374.

Almost surely, 2^{1655254645489} is an apocalyptic number.

1655254645489 is the 1286567-th square number.

1655254645489 is the 643284-th centered octagonal number.

It is an amenable number.

1655254645489 is a deficient number, since it is larger than the sum of its proper divisors (12347916122).

1655254645489 is an frugal number, since it uses more digits than its factorization.

1655254645489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19056 (or 9528 counting only the distinct ones).

The product of its digits is 207360000, while the sum is 64.

Multiplying 1655254645489 by its sum of digits (64), we get a square (105936297311296 = 10292536²).

The spelling of 1655254645489 in words is "one trillion, six hundred fifty-five billion, two hundred fifty-four million, six hundred forty-five thousand, four hundred eighty-nine".