1945121630420 has 24 divisors (see below), whose sum is σ = 4105490231304. Its totient is φ = 774099165056.

The previous prime is 1945121630411. The next prime is 1945121630437. The reversal of 1945121630420 is 240361215491.

It can be written as a sum of positive squares in 4 ways, for example, as 1399313921476 + 545807708944 = 1182926^2 + 738788^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 246838907 + ... + 246846786.

It is an arithmetic number, because the mean of its divisors is an integer number (171062092971).

Almost surely, 2^{1945121630420} is an apocalyptic number.

1945121630420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1945121630420 is an abundant number, since it is smaller than the sum of its proper divisors (2160368600884).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1945121630420 is a wasteful number, since it uses less digits than its factorization.

1945121630420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 493685899 (or 493685897 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 38.

The spelling of 1945121630420 in words is "one trillion, nine hundred forty-five billion, one hundred twenty-one million, six hundred thirty thousand, four hundred twenty".