1946542081 has 8 divisors (see below), whose sum is σ = 2140222464. Its totient is φ = 1755648720.

The previous prime is 1946542079. The next prime is 1946542099. The reversal of 1946542081 is 1802456491.

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

It is a cyclic number.

It is not a de Polignac number, because 1946542081 - 2¹ = 1946542079 is a prime.

It is a super-2 number, since 2×1946542081² = 7578052146207621122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1946542021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 695290 + ... + 698083.

It is an arithmetic number, because the mean of its divisors is an integer number (267527808).

Almost surely, 2^1946542081 is an apocalyptic number.

1946542081 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1946542081 is a deficient number, since it is larger than the sum of its proper divisors (193680383).

1946542081 is a wasteful number, since it uses less digits than its factorization.

1946542081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1393511.

The product of its (nonzero) digits is 69120, while the sum is 40.

The square root of 1946542081 is about 44119.6337360137. The cubic root of 1946542081 is about 1248.5940632129.

The spelling of 1946542081 in words is "one billion, nine hundred forty-six million, five hundred forty-two thousand, eighty-one".