1649122894 has 4 divisors (see below), whose sum is σ = 2473684344. Its totient is φ = 824561446.

The previous prime is 1649122877. The next prime is 1649122897. The reversal of 1649122894 is 4982219461.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1649122897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 412280722 + ... + 412280725.

It is an arithmetic number, because the mean of its divisors is an integer number (618421086).

Almost surely, 2^1649122894 is an apocalyptic number.

1649122894 is a deficient number, since it is larger than the sum of its proper divisors (824561450).

1649122894 is an equidigital number, since it uses as much as digits as its factorization.

1649122894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 824561449.

The product of its digits is 248832, while the sum is 46.

The square root of 1649122894 is about 40609.3941594799. The cubic root of 1649122894 is about 1181.4563303008.

The spelling of 1649122894 in words is "one billion, six hundred forty-nine million, one hundred twenty-two thousand, eight hundred ninety-four".