1051649064871 has 4 divisors (see below), whose sum is σ = 1076106019912. Its totient is φ = 1027192109832.

The previous prime is 1051649064827. The next prime is 1051649064881. The reversal of 1051649064871 is 1784609461501.

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 1051649064871 - 2²⁷ = 1051514847143 is a prime.

It is a super-2 number, since 2×1051649064871² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1051649064821) 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, 12228477456 + ... + 12228477541.

It is an arithmetic number, because the mean of its divisors is an integer number (269026504978).

Almost surely, 2^{1051649064871} is an apocalyptic number.

1051649064871 is a deficient number, since it is larger than the sum of its proper divisors (24456955041).

1051649064871 is an equidigital number, since it uses as much as digits as its factorization.

1051649064871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24456955040.

The product of its (nonzero) digits is 1451520, while the sum is 52.

The spelling of 1051649064871 in words is "one trillion, fifty-one billion, six hundred forty-nine million, sixty-four thousand, eight hundred seventy-one".