10491625809 has 24 divisors (see below), whose sum is σ = 17353994112. Its totient is φ = 5983277760.

The previous prime is 10491625801. The next prime is 10491625811. The reversal of 10491625809 is 90852619401.

10491625809 is a `hidden beast` number, since 1 + 0 + 4 + 9 + 1 + 62 + 580 + 9 = 666.

It is not a de Polignac number, because 10491625809 - 2³ = 10491625801 is a prime.

It is a super-2 number, since 2×10491625809² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (10491625801) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 133852 + ... + 197229.

It is an arithmetic number, because the mean of its divisors is an integer number (723083088).

Almost surely, 2^10491625809 is an apocalyptic number.

It is an amenable number.

10491625809 is a deficient number, since it is larger than the sum of its proper divisors (6862368303).

10491625809 is a wasteful number, since it uses less digits than its factorization.

10491625809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331597 (or 331594 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 45.

The spelling of 10491625809 in words is "ten billion, four hundred ninety-one million, six hundred twenty-five thousand, eight hundred nine".