1061858212791 has 8 divisors (see below), whose sum is σ = 1416200888064. Its totient is φ = 707710506360.

The previous prime is 1061858212781. The next prime is 1061858212801. The reversal of 1061858212791 is 1972128581601.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1061858212781) and next prime (1061858212801).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1061858212791 - 2¹³ = 1061858204599 is a prime.

It is a super-2 number, since 2×1061858212791² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1061858212771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48729501 + ... + 48751286.

It is an arithmetic number, because the mean of its divisors is an integer number (177025111008).

Almost surely, 2^{1061858212791} is an apocalyptic number.

1061858212791 is a deficient number, since it is larger than the sum of its proper divisors (354342675273).

1061858212791 is an equidigital number, since it uses as much as digits as its factorization.

1061858212791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97484421.

The product of its (nonzero) digits is 483840, while the sum is 51.

The spelling of 1061858212791 in words is "one trillion, sixty-one billion, eight hundred fifty-eight million, two hundred twelve thousand, seven hundred ninety-one".