1946953881 has 16 divisors (see below), whose sum is σ = 2888308800. Its totient is φ = 1296199584.

The previous prime is 1946953861. The next prime is 1946953891. The reversal of 1946953881 is 1883596491.

It is not a de Polignac number, because 1946953881 - 2¹⁵ = 1946921113 is a prime.

It is a super-2 number, since 2×1946953881² = 7581258829481924322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1946953861) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28836 + ... + 68741.

It is an arithmetic number, because the mean of its divisors is an integer number (180519300).

Almost surely, 2^1946953881 is an apocalyptic number.

It is an amenable number.

1946953881 is a deficient number, since it is larger than the sum of its proper divisors (941354919).

1946953881 is an equidigital number, since it uses as much as digits as its factorization.

1946953881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98325 (or 98319 counting only the distinct ones).

The product of its digits is 1866240, while the sum is 54.

The square root of 1946953881 is about 44124.3003457279. The cubic root of 1946953881 is about 1248.6821056252.

The spelling of 1946953881 in words is "one billion, nine hundred forty-six million, nine hundred fifty-three thousand, eight hundred eighty-one".