1501643120640 has 224 divisors, whose sum is σ = 5174582870016. Its totient is φ = 369634836480.

The previous prime is 1501643120639. The next prime is 1501643120687. The reversal of 1501643120640 is 460213461051.

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, 1127425 + ... + 2067455.

It is an arithmetic number, because the mean of its divisors is an integer number (23100816384).

Almost surely, 2^{1501643120640} is an apocalyptic number.

1501643120640 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 1501643120640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2587291435008).

1501643120640 is an abundant number, since it is smaller than the sum of its proper divisors (3672939749376).

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

1501643120640 is an equidigital number, since it uses as much as digits as its factorization.

1501643120640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 940078 (or 940054 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 33.

Adding to 1501643120640 its reverse (460213461051), we get a palindrome (1961856581691).

The spelling of 1501643120640 in words is "one trillion, five hundred one billion, six hundred forty-three million, one hundred twenty thousand, six hundred forty".