9619144540 has 12 divisors (see below), whose sum is σ = 20200203576. Its totient is φ = 3847657808.

The previous prime is 9619144537. The next prime is 9619144541. The reversal of 9619144540 is 454419169.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9619144541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 240478594 + ... + 240478633.

It is an arithmetic number, because the mean of its divisors is an integer number (1683350298).

Almost surely, 2^9619144540 is an apocalyptic number.

It is an amenable number.

9619144540 is an abundant number, since it is smaller than the sum of its proper divisors (10581059036).

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

9619144540 is a wasteful number, since it uses less digits than its factorization.

9619144540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 480957236 (or 480957234 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 43.

The square root of 9619144540 is about 98077.2376242316. The cubic root of 9619144540 is about 2126.7289856488.

The spelling of 9619144540 in words is "nine billion, six hundred nineteen million, one hundred forty-four thousand, five hundred forty".