1061055055491 has 4 divisors (see below), whose sum is σ = 1414740073992. Its totient is φ = 707370036992.

The previous prime is 1061055055441. The next prime is 1061055055493. The reversal of 1061055055491 is 1945505501601.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1061055055491 - 2¹⁰ = 1061055054467 is a prime.

It is a super-2 number, since 2×1061055055491² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1061055055493) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 176842509246 + ... + 176842509251.

It is an arithmetic number, because the mean of its divisors is an integer number (353685018498).

Almost surely, 2^{1061055055491} is an apocalyptic number.

1061055055491 is a deficient number, since it is larger than the sum of its proper divisors (353685018501).

1061055055491 is an equidigital number, since it uses as much as digits as its factorization.

1061055055491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 353685018500.

The product of its (nonzero) digits is 135000, while the sum is 42.

The spelling of 1061055055491 in words is "one trillion, sixty-one billion, fifty-five million, fifty-five thousand, four hundred ninety-one".