1023113645261 has 8 divisors (see below), whose sum is σ = 1033597353984. Its totient is φ = 1012640524560.

The previous prime is 1023113645243. The next prime is 1023113645297. The reversal of 1023113645261 is 1625463113201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1023113645261 is a prime.

It is a super-2 number, since 2×1023113645261² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1023113645161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2452685 + ... + 2839346.

It is an arithmetic number, because the mean of its divisors is an integer number (129199669248).

Almost surely, 2^{1023113645261} is an apocalyptic number.

It is an amenable number.

1023113645261 is a deficient number, since it is larger than the sum of its proper divisors (10483708723).

1023113645261 is a wasteful number, since it uses less digits than its factorization.

1023113645261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5294011.

The product of its (nonzero) digits is 25920, while the sum is 35.

Adding to 1023113645261 its reverse (1625463113201), we get a palindrome (2648576758462).

The spelling of 1023113645261 in words is "one trillion, twenty-three billion, one hundred thirteen million, six hundred forty-five thousand, two hundred sixty-one".