1361601511 has 2 divisors, whose sum is σ = 1361601512. Its totient is φ = 1361601510.

The previous prime is 1361601509. The next prime is 1361601583. The reversal of 1361601511 is 1151061631.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1361601511 - 2¹ = 1361601509 is a prime.

Together with 1361601509, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1361601211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 680800755 + 680800756.

It is an arithmetic number, because the mean of its divisors is an integer number (680800756).

Almost surely, 2^1361601511 is an apocalyptic number.

1361601511 is a deficient number, since it is larger than the sum of its proper divisors (1).

1361601511 is an equidigital number, since it uses as much as digits as its factorization.

1361601511 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 540, while the sum is 25.

The square root of 1361601511 is about 36899.8849727204. The cubic root of 1361601511 is about 1108.3663740704.

The spelling of 1361601511 in words is "one billion, three hundred sixty-one million, six hundred one thousand, five hundred eleven".