1020545991092 has 24 divisors (see below), whose sum is σ = 1792753368840. Its totient is φ = 508331079680.

The previous prime is 1020545991029. The next prime is 1020545991131. The reversal of 1020545991092 is 2901995450201.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 572147011216 + 448398979876 = 756404^2 + 669626^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14444492 + ... + 14514972.

It is an arithmetic number, because the mean of its divisors is an integer number (74698057035).

Almost surely, 2^{1020545991092} is an apocalyptic number.

It is an amenable number.

1020545991092 is a deficient number, since it is larger than the sum of its proper divisors (772207377748).

1020545991092 is a wasteful number, since it uses less digits than its factorization.

1020545991092 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84211 (or 84209 counting only the distinct ones).

The product of its (nonzero) digits is 291600, while the sum is 47.

The spelling of 1020545991092 in words is "one trillion, twenty billion, five hundred forty-five million, nine hundred ninety-one thousand, ninety-two".