10251665091 has 24 divisors (see below), whose sum is σ = 15689868480. Its totient is φ = 6427965696.

The previous prime is 10251665077. The next prime is 10251665107. The reversal of 10251665091 is 19056615201.

10251665091 is a `hidden beast` number, since 1 + 0 + 2 + 516 + 6 + 50 + 91 = 666.

It is not a de Polignac number, because 10251665091 - 2⁷ = 10251664963 is a prime.

It is not an unprimeable number, because it can be changed into a prime (10251665791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 205990 + ... + 250868.

It is an arithmetic number, because the mean of its divisors is an integer number (653744520).

Almost surely, 2^10251665091 is an apocalyptic number.

10251665091 is a deficient number, since it is larger than the sum of its proper divisors (5438203389).

10251665091 is a wasteful number, since it uses less digits than its factorization.

10251665091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46395 (or 46392 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 36.

The spelling of 10251665091 in words is "ten billion, two hundred fifty-one million, six hundred sixty-five thousand, ninety-one".