1020545614645 has 4 divisors (see below), whose sum is σ = 1224654737580. Its totient is φ = 816436491712.

The previous prime is 1020545614637. The next prime is 1020545614657. The reversal of 1020545614645 is 5464165450201.

1020545614645 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 208394989009 + 812150625636 = 456503^2 + 901194^2 .

It is a cyclic number.

It is not a de Polignac number, because 1020545614645 - 2³ = 1020545614637 is a prime.

It is a super-2 number, since 2×1020545614645² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102054561460 + ... + 102054561469.

It is an arithmetic number, because the mean of its divisors is an integer number (306163684395).

Almost surely, 2^{1020545614645} is an apocalyptic number.

It is an amenable number.

1020545614645 is a deficient number, since it is larger than the sum of its proper divisors (204109122935).

1020545614645 is an equidigital number, since it uses as much as digits as its factorization.

1020545614645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204109122934.

The product of its (nonzero) digits is 576000, while the sum is 43.

The spelling of 1020545614645 in words is "one trillion, twenty billion, five hundred forty-five million, six hundred fourteen thousand, six hundred forty-five".