190915645440 has 208 divisors, whose sum is σ = 657847124928. Its totient is φ = 46994423808.

The previous prime is 190915645439. The next prime is 190915645499. The reversal of 190915645440 is 44546519091.

It is a tau number, because it is divible by the number of its divisors (208).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 190915645440.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 679207 + ... + 918233.

Almost surely, 2^190915645440 is an apocalyptic number.

190915645440 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 190915645440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (328923562464).

190915645440 is an abundant number, since it is smaller than the sum of its proper divisors (466931479488).

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

190915645440 is a wasteful number, since it uses less digits than its factorization.

190915645440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239072 (or 239050 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 48.

The spelling of 190915645440 in words is "one hundred ninety billion, nine hundred fifteen million, six hundred forty-five thousand, four hundred forty".