42494936449 has 21 divisors (see below), whose sum is σ = 49659994371. Its totient is φ = 36363625200.

The previous prime is 42494936447. The next prime is 42494936453. The reversal of 42494936449 is 94463949424.

The square root of 42494936449 is 206143.

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

It can be written as a sum of positive squares in only one way, i.e., 35718354049 + 6776582400 = 188993^2 + 82320^2 .

It is not a de Polignac number, because 42494936449 - 2¹ = 42494936447 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42494936393 and 42494936402.

It is not an unprimeable number, because it can be changed into a prime (42494936447) by changing a digit.

It is a polite number, since it can be written in 20 ways as a sum of consecutive naturals, for example, 70706749 + ... + 70707349.

Almost surely, 2^42494936449 is an apocalyptic number.

42494936449 is a gapful number since it is divisible by the number (49) formed by its first and last digit.

42494936449 is the 206143-rd square number.

42494936449 is the 103072-nd centered octagonal number.

It is an amenable number.

42494936449 is a deficient number, since it is larger than the sum of its proper divisors (7165057922).

42494936449 is an frugal number, since it uses more digits than its factorization.

42494936449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1244 (or 608 counting only the distinct ones).

The product of its digits is 26873856, while the sum is 58.

The spelling of 42494936449 in words is "forty-two billion, four hundred ninety-four million, nine hundred thirty-six thousand, four hundred forty-nine".