10449699840 has 528 divisors, whose sum is σ = 38733694272. Its totient is φ = 2699329536.

The previous prime is 10449699839. The next prime is 10449699899. The reversal of 10449699840 is 4899694401.

It is a happy number.

10449699840 is a `hidden beast` number, since 10 + 449 + 69 + 98 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 46033807 + ... + 46034033.

Almost surely, 2^10449699840 is an apocalyptic number.

10449699840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 10449699840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19366847136).

10449699840 is an abundant number, since it is smaller than the sum of its proper divisors (28283994432).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

10449699840 is an equidigital number, since it uses as much as digits as its factorization.

10449699840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304 (or 274 counting only the distinct ones).

The product of its (nonzero) digits is 2239488, while the sum is 54.

The spelling of 10449699840 in words is "ten billion, four hundred forty-nine million, six hundred ninety-nine thousand, eight hundred forty".