1946902661 has 8 divisors (see below), whose sum is σ = 2124760800. Its totient is φ = 1769189040.

The previous prime is 1946902649. The next prime is 1946902669. The reversal of 1946902661 is 1662096491.

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 1946902661 - 2²² = 1942708357 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 (1946902669) 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, 6926 + ... + 62783.

It is an arithmetic number, because the mean of its divisors is an integer number (265595100).

Almost surely, 2^1946902661 is an apocalyptic number.

1946902661 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1946902661 is a deficient number, since it is larger than the sum of its proper divisors (177858139).

1946902661 is a wasteful number, since it uses less digits than its factorization.

1946902661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72259.

The product of its (nonzero) digits is 139968, while the sum is 44.

The square root of 1946902661 is about 44123.7199361069. The cubic root of 1946902661 is about 1248.6711555185.

The spelling of 1946902661 in words is "one billion, nine hundred forty-six million, nine hundred two thousand, six hundred sixty-one".