1131615145661 has 64 divisors (see below), whose sum is σ = 1591608324096. Its totient is φ = 775526400000.

The previous prime is 1131615145649. The next prime is 1131615145669. The reversal of 1131615145661 is 1665415161311.

It is not a de Polignac number, because 1131615145661 - 2¹⁴ = 1131615129277 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131615145669) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5821286 + ... + 6012536.

It is an arithmetic number, because the mean of its divisors is an integer number (24868880064).

Almost surely, 2^{1131615145661} is an apocalyptic number.

1131615145661 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1131615145661 is a deficient number, since it is larger than the sum of its proper divisors (459993178435).

1131615145661 is a wasteful number, since it uses less digits than its factorization.

1131615145661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191562.

The product of its digits is 64800, while the sum is 41.

The spelling of 1131615145661 in words is "one trillion, one hundred thirty-one billion, six hundred fifteen million, one hundred forty-five thousand, six hundred sixty-one".