2036154909721 has 3 divisors (see below), whose sum is σ = 2036156336661. Its totient is φ = 2036153482782.

The previous prime is 2036154909653. The next prime is 2036154909773. The reversal of 2036154909721 is 1279094516302.

The square root of 2036154909721 is 1426939.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 2036154909721 - 2¹¹ = 2036154907673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2036454909721) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 713470 + ... + 2140408.

It is an arithmetic number, because the mean of its divisors is an integer number (678718778887).

Almost surely, 2^{2036154909721} is an apocalyptic number.

2036154909721 is the 1426939-th square number.

2036154909721 is the 713470-th centered octagonal number.

It is an amenable number.

2036154909721 is a deficient number, since it is larger than the sum of its proper divisors (1426940).

2036154909721 is an frugal number, since it uses more digits than its factorization.

2036154909721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2853878 (or 1426939 counting only the distinct ones).

The product of its (nonzero) digits is 816480, while the sum is 49.

Multiplying 2036154909721 by its sum of digits (49), we get a square (99771590576329 = 9988573²).

The spelling of 2036154909721 in words is "two trillion, thirty-six billion, one hundred fifty-four million, nine hundred nine thousand, seven hundred twenty-one".