1620026575361 has 2 divisors, whose sum is σ = 1620026575362. Its totient is φ = 1620026575360.

The previous prime is 1620026575331. The next prime is 1620026575393. The reversal of 1620026575361 is 1635756200261.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1614630203761 + 5396371600 = 1270681^2 + 73460^2 .

It is a cyclic number.

It is not a de Polignac number, because 1620026575361 - 2²² = 1620022381057 is a prime.

It is a super-2 number, since 2×1620026575361² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1620026575331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 810013287680 + 810013287681.

It is an arithmetic number, because the mean of its divisors is an integer number (810013287681).

Almost surely, 2^{1620026575361} is an apocalyptic number.

It is an amenable number.

1620026575361 is a deficient number, since it is larger than the sum of its proper divisors (1).

1620026575361 is an equidigital number, since it uses as much as digits as its factorization.

1620026575361 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 453600, while the sum is 44.

The spelling of 1620026575361 in words is "one trillion, six hundred twenty billion, twenty-six million, five hundred seventy-five thousand, three hundred sixty-one".