11601431377 has 2 divisors, whose sum is σ = 11601431378. Its totient is φ = 11601431376.

The previous prime is 11601431333. The next prime is 11601431389. The reversal of 11601431377 is 77313410611.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11254875921 + 346555456 = 106089^2 + 18616^2 .

It is a cyclic number.

It is not a de Polignac number, because 11601431377 - 2⁷ = 11601431249 is a prime.

It is a super-2 number, since 2×11601431377² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11601431327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5800715688 + 5800715689.

It is an arithmetic number, because the mean of its divisors is an integer number (5800715689).

Almost surely, 2^11601431377 is an apocalyptic number.

It is an amenable number.

11601431377 is a deficient number, since it is larger than the sum of its proper divisors (1).

11601431377 is an equidigital number, since it uses as much as digits as its factorization.

11601431377 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10584, while the sum is 34.

Adding to 11601431377 its reverse (77313410611), we get a palindrome (88914841988).

The spelling of 11601431377 in words is "eleven billion, six hundred one million, four hundred thirty-one thousand, three hundred seventy-seven".