78530545736811 has 80 divisors (see below), whose sum is σ = 136682183278080. Its totient is φ = 44003993644800.

The previous prime is 78530545736809. The next prime is 78530545736827. The reversal of 78530545736811 is 11863754503587.

78530545736811 is a `hidden beast` number, since 7 + 8 + 5 + 3 + 0 + 54 + 573 + 6 + 8 + 1 + 1 = 666.

It is not a de Polignac number, because 78530545736811 - 2¹ = 78530545736809 is a prime.

It is a super-2 number, since 2×78530545736811² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (78530545776811) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 10487610 + ... + 16341696.

It is an arithmetic number, because the mean of its divisors is an integer number (1708527290976).

Almost surely, 2^{78530545736811} is an apocalyptic number.

78530545736811 is a deficient number, since it is larger than the sum of its proper divisors (58151637541269).

78530545736811 is a wasteful number, since it uses less digits than its factorization.

78530545736811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5854566 (or 5854557 counting only the distinct ones).

The product of its (nonzero) digits is 84672000, while the sum is 63.

The spelling of 78530545736811 in words is "seventy-eight trillion, five hundred thirty billion, five hundred forty-five million, seven hundred thirty-six thousand, eight hundred eleven".