1951796649 has 16 divisors (see below), whose sum is σ = 2846730240. Its totient is φ = 1179676560.

The previous prime is 1951796647. The next prime is 1951796653. The reversal of 1951796649 is 9466971591.

It is not a de Polignac number, because 1951796649 - 2¹ = 1951796647 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1951796647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68469 + ... + 92690.

It is an arithmetic number, because the mean of its divisors is an integer number (177920640).

Almost surely, 2^1951796649 is an apocalyptic number.

It is an amenable number.

1951796649 is a deficient number, since it is larger than the sum of its proper divisors (894933591).

1951796649 is a wasteful number, since it uses less digits than its factorization.

1951796649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161540.

The product of its digits is 3674160, while the sum is 57.

The square root of 1951796649 is about 44179.1426919989. The cubic root of 1951796649 is about 1249.7165541850.

The spelling of 1951796649 in words is "one billion, nine hundred fifty-one million, seven hundred ninety-six thousand, six hundred forty-nine".