1051778871 has 32 divisors (see below), whose sum is σ = 1830608640. Its totient is φ = 588405600.

The previous prime is 1051778843. The next prime is 1051778887. The reversal of 1051778871 is 1788771501.

It is not a de Polignac number, because 1051778871 - 2⁶ = 1051778807 is a prime.

It is a super-2 number, since 2×1051778871² = 2212477586964069282, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1051770871) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 132345 + ... + 140066.

It is an arithmetic number, because the mean of its divisors is an integer number (57206520).

Almost surely, 2^1051778871 is an apocalyptic number.

1051778871 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1051778871 is a deficient number, since it is larger than the sum of its proper divisors (778829769).

1051778871 is a wasteful number, since it uses less digits than its factorization.

1051778871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272444 (or 272438 counting only the distinct ones).

The product of its (nonzero) digits is 109760, while the sum is 45.

The square root of 1051778871 is about 32431.1404517325. The cubic root of 1051778871 is about 1016.9700132995.

The spelling of 1051778871 in words is "one billion, fifty-one million, seven hundred seventy-eight thousand, eight hundred seventy-one".