11156540401 has 2 divisors, whose sum is σ = 11156540402. Its totient is φ = 11156540400.

The previous prime is 11156540347. The next prime is 11156540407. The reversal of 11156540401 is 10404565111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6447287025 + 4709253376 = 80295^2 + 68624^2 .

It is a cyclic number.

It is not a de Polignac number, because 11156540401 - 2²¹ = 11154443249 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11156540401.

It is not a weakly prime, because it can be changed into another prime (11156540407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5578270200 + 5578270201.

It is an arithmetic number, because the mean of its divisors is an integer number (5578270201).

Almost surely, 2^11156540401 is an apocalyptic number.

It is an amenable number.

11156540401 is a deficient number, since it is larger than the sum of its proper divisors (1).

11156540401 is an equidigital number, since it uses as much as digits as its factorization.

11156540401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2400, while the sum is 28.

The spelling of 11156540401 in words is "eleven billion, one hundred fifty-six million, five hundred forty thousand, four hundred one".