2136732905981 has 4 divisors (see below), whose sum is σ = 2137160001312. Its totient is φ = 2136305810652.

The previous prime is 2136732905953. The next prime is 2136732906017. The reversal of 2136732905981 is 1895092376312.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2136732905981 - 2²⁶ = 2136665797117 is a prime.

It is a super-2 number, since 2×2136732905981² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2136732905911) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 213540161 + ... + 213550166.

It is an arithmetic number, because the mean of its divisors is an integer number (534290000328).

Almost surely, 2^{2136732905981} is an apocalyptic number.

It is an amenable number.

2136732905981 is a deficient number, since it is larger than the sum of its proper divisors (427095331).

2136732905981 is an equidigital number, since it uses as much as digits as its factorization.

2136732905981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 427095330.

The product of its (nonzero) digits is 4898880, while the sum is 56.

The spelling of 2136732905981 in words is "two trillion, one hundred thirty-six billion, seven hundred thirty-two million, nine hundred five thousand, nine hundred eighty-one".