245037831921 has 24 divisors (see below), whose sum is σ = 386852903424. Its totient is φ = 148789572480.

The previous prime is 245037831893. The next prime is 245037831923. The reversal of 245037831921 is 129138730542.

It is a happy number.

245037831921 is a `hidden beast` number, since 2 + 450 + 3 + 7 + 8 + 3 + 192 + 1 = 666.

245037831921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 245037831921 - 2⁷ = 245037831793 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (245037831923) 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 23 ways as a sum of consecutive naturals, for example, 25826781 + ... + 25836266.

It is an arithmetic number, because the mean of its divisors is an integer number (16118870976).

Almost surely, 2^245037831921 is an apocalyptic number.

It is an amenable number.

245037831921 is a deficient number, since it is larger than the sum of its proper divisors (141815071503).

245037831921 is a wasteful number, since it uses less digits than its factorization.

245037831921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51663101 (or 51663098 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

The spelling of 245037831921 in words is "two hundred forty-five billion, thirty-seven million, eight hundred thirty-one thousand, nine hundred twenty-one".