1646046242 has 4 divisors (see below), whose sum is σ = 2469069366. Its totient is φ = 823023120.

The previous prime is 1646046223. The next prime is 1646046263. The reversal of 1646046242 is 2426406461.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 977875441 + 668170801 = 31271^2 + 25849^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 411511559 + ... + 411511562.

Almost surely, 2^1646046242 is an apocalyptic number.

1646046242 is a deficient number, since it is larger than the sum of its proper divisors (823023124).

1646046242 is an equidigital number, since it uses as much as digits as its factorization.

1646046242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 823023123.

The product of its (nonzero) digits is 55296, while the sum is 35.

The square root of 1646046242 is about 40571.4954370676. The cubic root of 1646046242 is about 1180.7211530706.

It can be divided in two parts, 164 and 6046242, that added together give a palindrome (6046406).

The spelling of 1646046242 in words is "one billion, six hundred forty-six million, forty-six thousand, two hundred forty-two".