1515261001640 has 32 divisors (see below), whose sum is σ = 3409398881280. Its totient is φ = 606093444672.

The previous prime is 1515261001637. The next prime is 1515261001651. The reversal of 1515261001640 is 461001625151.

It is a junction number, because it is equal to n+sod(n) for n = 1515261001597 and 1515261001606.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2116097 + ... + 2740143.

It is an arithmetic number, because the mean of its divisors is an integer number (106543715040).

Almost surely, 2^{1515261001640} is an apocalyptic number.

1515261001640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1515261001640 is an abundant number, since it is smaller than the sum of its proper divisors (1894137879640).

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

1515261001640 is a wasteful number, since it uses less digits than its factorization.

1515261001640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 684761 (or 684757 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 32.

Adding to 1515261001640 its reverse (461001625151), we get a palindrome (1976262626791).

The spelling of 1515261001640 in words is "one trillion, five hundred fifteen billion, two hundred sixty-one million, one thousand, six hundred forty".