1153401505261 has 2 divisors, whose sum is σ = 1153401505262. Its totient is φ = 1153401505260.

The previous prime is 1153401505247. The next prime is 1153401505327. The reversal of 1153401505261 is 1625051043511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1136110833225 + 17290672036 = 1065885^2 + 131494^2 .

It is a cyclic number.

It is not a de Polignac number, because 1153401505261 - 2⁵ = 1153401505229 is a prime.

It is a super-2 number, since 2×1153401505261² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1153401605261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 576700752630 + 576700752631.

It is an arithmetic number, because the mean of its divisors is an integer number (576700752631).

Almost surely, 2^{1153401505261} is an apocalyptic number.

It is an amenable number.

1153401505261 is a deficient number, since it is larger than the sum of its proper divisors (1).

1153401505261 is an equidigital number, since it uses as much as digits as its factorization.

1153401505261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18000, while the sum is 34.

Adding to 1153401505261 its reverse (1625051043511), we get a palindrome (2778452548772).

The spelling of 1153401505261 in words is "one trillion, one hundred fifty-three billion, four hundred one million, five hundred five thousand, two hundred sixty-one".