1613420742025 has 9 divisors (see below), whose sum is σ = 2000649595413. Its totient is φ = 1290731512800.

The previous prime is 1613420742019. The next prime is 1613420742067. The reversal of 1613420742025 is 5202470243161.

The square root of 1613420742025 is 1270205.

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

It can be written as a sum of positive squares in 4 ways, for example, as 550286526969 + 1063134215056 = 741813^2 + 1031084^2 .

It is not a de Polignac number, because 1613420742025 - 2⁷ = 1613420741897 is a prime.

It is a super-2 number, since 2×1613420742025² (a number of 25 digits) contains 22 as substring.

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, 6224005 + ... + 6478045.

Almost surely, 2^{1613420742025} is an apocalyptic number.

1613420742025 is the 1270205-th square number.

1613420742025 is the 635103-rd centered octagonal number.

It is an amenable number.

1613420742025 is a deficient number, since it is larger than the sum of its proper divisors (387228853388).

1613420742025 is an frugal number, since it uses more digits than its factorization.

1613420742025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 508092 (or 254046 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 37.

Adding to 1613420742025 its reverse (5202470243161), we get a palindrome (6815890985186).

The spelling of 1613420742025 in words is "one trillion, six hundred thirteen billion, four hundred twenty million, seven hundred forty-two thousand, twenty-five".