1620796341025 has 27 divisors (see below), whose sum is σ = 2030688876459. Its totient is φ = 1283289840000.

The previous prime is 1620796341023. The next prime is 1620796341041. The reversal of 1620796341025 is 5201436970261.

It is a happy number.

The square root of 1620796341025 is 1273105.

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

It can be written as a sum of positive squares in 13 ways, for example, as 1285305166369 + 335491174656 = 1133713^2 + 579216^2 .

It is not a de Polignac number, because 1620796341025 - 2¹ = 1620796341023 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1620796341023) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 642916765 + ... + 642919285.

Almost surely, 2^{1620796341025} is an apocalyptic number.

1620796341025 is the 1273105-th square number.

1620796341025 is the 636553-rd centered octagonal number.

It is an amenable number.

1620796341025 is a deficient number, since it is larger than the sum of its proper divisors (409892535434).

1620796341025 is an frugal number, since it uses more digits than its factorization.

1620796341025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5254 (or 2627 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 46.

The spelling of 1620796341025 in words is "one trillion, six hundred twenty billion, seven hundred ninety-six million, three hundred forty-one thousand, twenty-five".