1631922240645 has 48 divisors (see below), whose sum is σ = 2894653681920. Its totient is φ = 850057262208.

The previous prime is 1631922240601. The next prime is 1631922240649. The reversal of 1631922240645 is 5460422291361.

1631922240645 is a `hidden beast` number, since 1 + 6 + 3 + 19 + 222 + 406 + 4 + 5 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-1631922240645 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 1631922240645.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1631922240649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 43787839 + ... + 43825091.

It is an arithmetic number, because the mean of its divisors is an integer number (60305285040).

Almost surely, 2^{1631922240645} is an apocalyptic number.

1631922240645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1631922240645 is a deficient number, since it is larger than the sum of its proper divisors (1262731441275).

1631922240645 is a wasteful number, since it uses less digits than its factorization.

1631922240645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59946 (or 59943 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 45.

The spelling of 1631922240645 in words is "one trillion, six hundred thirty-one billion, nine hundred twenty-two million, two hundred forty thousand, six hundred forty-five".