6503400740720 has 80 divisors (see below), whose sum is σ = 16287327981792. Its totient is φ = 2400693365760.

The previous prime is 6503400740659. The next prime is 6503400740737. The reversal of 6503400740720 is 270470043056.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×6503400740720² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

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, 3724310 + ... + 5184330.

Almost surely, 2^{6503400740720} is an apocalyptic number.

It is an amenable number.

6503400740720 is an abundant number, since it is smaller than the sum of its proper divisors (9783927241072).

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

6503400740720 is a wasteful number, since it uses less digits than its factorization.

6503400740720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1464330 (or 1464324 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 38.

Adding to 6503400740720 its reverse (270470043056), we get a palindrome (6773870783776).

The spelling of 6503400740720 in words is "six trillion, five hundred three billion, four hundred million, seven hundred forty thousand, seven hundred twenty".