1649168951 has 2 divisors, whose sum is σ = 1649168952. Its totient is φ = 1649168950.

The previous prime is 1649168923. The next prime is 1649168957. The reversal of 1649168951 is 1598619461.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1649168951 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1649168951.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1649168957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 824584475 + 824584476.

It is an arithmetic number, because the mean of its divisors is an integer number (824584476).

Almost surely, 2^1649168951 is an apocalyptic number.

1649168951 is a deficient number, since it is larger than the sum of its proper divisors (1).

1649168951 is an equidigital number, since it uses as much as digits as its factorization.

1649168951 is an evil number, because the sum of its binary digits is even.

The product of its digits is 466560, while the sum is 50.

The square root of 1649168951 is about 40609.9612287429. The cubic root of 1649168951 is about 1181.4673288399.

The spelling of 1649168951 in words is "one billion, six hundred forty-nine million, one hundred sixty-eight thousand, nine hundred fifty-one".