2386737638649 has 81 divisors (see below), whose sum is σ = 4343356089423. Its totient is φ = 1258716068064.

The previous prime is 2386737638591. The next prime is 2386737638687. The reversal of 2386737638649 is 9468367376832.

The square root of 2386737638649 is 1544907.

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

2386737638649 is a `hidden beast` number, since 2 + 386 + 73 + 7 + 63 + 86 + 49 = 666.

It can be written as a sum of positive squares in only one way, i.e., 353067698025 + 2033669940624 = 594195^2 + 1426068^2 .

It is not a de Polignac number, because 2386737638649 - 2⁷ = 2386737638521 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2386737638149) by changing a digit.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 421756782 + ... + 421762440.

Almost surely, 2^{2386737638649} is an apocalyptic number.

2386737638649 is the 1544907-th square number.

2386737638649 is the 772454-th centered octagonal number.

It is an amenable number.

2386737638649 is a deficient number, since it is larger than the sum of its proper divisors (1956618450774).

2386737638649 is an frugal number, since it uses more digits than its factorization.

2386737638649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11364 (or 5682 counting only the distinct ones).

The product of its digits is 1316818944, while the sum is 72.

The spelling of 2386737638649 in words is "two trillion, three hundred eighty-six billion, seven hundred thirty-seven million, six hundred thirty-eight thousand, six hundred forty-nine".