6545772345840 has 320 divisors, whose sum is σ = 25780275290112. Its totient is φ = 1336534732800.

The previous prime is 6545772345839. The next prime is 6545772345877. The reversal of 6545772345840 is 485432775456.

It is a Harshad number since it is a multiple of its sum of digits (60).

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, 4157071 + ... + 5511150.

Almost surely, 2^{6545772345840} is an apocalyptic number.

6545772345840 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6545772345840 is an abundant number, since it is smaller than the sum of its proper divisors (19234502944272).

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

6545772345840 is a wasteful number, since it uses less digits than its factorization.

6545772345840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9668288 (or 9668282 counting only the distinct ones).

The product of its (nonzero) digits is 112896000, while the sum is 60.

The spelling of 6545772345840 in words is "six trillion, five hundred forty-five billion, seven hundred seventy-two million, three hundred forty-five thousand, eight hundred forty".