1061992451521 has 4 divisors (see below), whose sum is σ = 1062099012352. Its totient is φ = 1061885890692.

The previous prime is 1061992451497. The next prime is 1061992451549. The reversal of 1061992451521 is 1251542991601.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1061992451521 - 2¹¹ = 1061992449473 is a prime.

It is a super-2 number, since 2×1061992451521² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1061990451521) 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 3 ways as a sum of consecutive naturals, for example, 53265465 + ... + 53285398.

It is an arithmetic number, because the mean of its divisors is an integer number (265524753088).

Almost surely, 2^{1061992451521} is an apocalyptic number.

It is an amenable number.

1061992451521 is a deficient number, since it is larger than the sum of its proper divisors (106560831).

1061992451521 is an equidigital number, since it uses as much as digits as its factorization.

1061992451521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106560830.

The product of its (nonzero) digits is 194400, while the sum is 46.

The spelling of 1061992451521 in words is "one trillion, sixty-one billion, nine hundred ninety-two million, four hundred fifty-one thousand, five hundred twenty-one".