1641878071 has 24 divisors (see below), whose sum is σ = 1801697040. Its totient is φ = 1494807552.

The previous prime is 1641878057. The next prime is 1641878083. The reversal of 1641878071 is 1708781461.

It is not a de Polignac number, because 1641878071 - 2⁷ = 1641877943 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1641878011) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2491140 + ... + 2491798.

It is an arithmetic number, because the mean of its divisors is an integer number (75070710).

Almost surely, 2^1641878071 is an apocalyptic number.

1641878071 is a deficient number, since it is larger than the sum of its proper divisors (159818969).

1641878071 is a wasteful number, since it uses less digits than its factorization.

1641878071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 963 (or 946 counting only the distinct ones).

The product of its (nonzero) digits is 75264, while the sum is 43.

The square root of 1641878071 is about 40520.0946568490. The cubic root of 1641878071 is about 1179.7236906907.

The spelling of 1641878071 in words is "one billion, six hundred forty-one million, eight hundred seventy-eight thousand, seventy-one".