1678945722 has 16 divisors (see below), whose sum is σ = 3359925792. Its totient is φ = 559309520.

The previous prime is 1678945717. The next prime is 1678945727. The reversal of 1678945722 is 2275498761.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1678945717) and next prime (1678945727).

It is not an unprimeable number, because it can be changed into a prime (1678945727) 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, 73929 + ... + 93932.

It is an arithmetic number, because the mean of its divisors is an integer number (209995362).

Almost surely, 2^1678945722 is an apocalyptic number.

1678945722 is an abundant number, since it is smaller than the sum of its proper divisors (1680980070).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1678945722 is a wasteful number, since it uses less digits than its factorization.

1678945722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169533.

The product of its digits is 1693440, while the sum is 51.

The square root of 1678945722 is about 40974.9401707922. The cubic root of 1678945722 is about 1188.5356660504.

The spelling of 1678945722 in words is "one billion, six hundred seventy-eight million, nine hundred forty-five thousand, seven hundred twenty-two".