1915537494640 has 320 divisors, whose sum is σ = 5668942878720. Its totient is φ = 584583966720.

The previous prime is 1915537494599. The next prime is 1915537494727. The reversal of 1915537494640 is 464947355191.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 166172557 + ... + 166184083.

It is an arithmetic number, because the mean of its divisors is an integer number (17715446496).

Almost surely, 2^{1915537494640} is an apocalyptic number.

1915537494640 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 1915537494640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2834471439360).

1915537494640 is an abundant number, since it is smaller than the sum of its proper divisors (3753405384080).

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

1915537494640 is a wasteful number, since it uses less digits than its factorization.

1915537494640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12120 (or 12114 counting only the distinct ones).

The product of its (nonzero) digits is 16329600, while the sum is 58.

The spelling of 1915537494640 in words is "one trillion, nine hundred fifteen billion, five hundred thirty-seven million, four hundred ninety-four thousand, six hundred forty".