122040531649 has 3 divisors (see below), whose sum is σ = 122040880993. Its totient is φ = 122040182306.

The previous prime is 122040531647. The next prime is 122040531761. The reversal of 122040531649 is 946135040221.

It is a happy number.

The square root of 122040531649 is 349343.

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 122040531649 - 2¹ = 122040531647 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122040531647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 174672 + ... + 524014.

Almost surely, 2^122040531649 is an apocalyptic number.

122040531649 is the 349343-rd square number.

122040531649 is the 174672-nd centered octagonal number.

It is an amenable number.

122040531649 is a deficient number, since it is larger than the sum of its proper divisors (349344).

122040531649 is an frugal number, since it uses more digits than its factorization.

122040531649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 698686 (or 349343 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 37.

The spelling of 122040531649 in words is "one hundred twenty-two billion, forty million, five hundred thirty-one thousand, six hundred forty-nine".