78181083724513 has 16 divisors (see below), whose sum is σ = 97520324244480. Its totient is φ = 60890447307600.

The previous prime is 78181083724511. The next prime is 78181083724567. The reversal of 78181083724513 is 31542738018187.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 78181083724513 - 2¹ = 78181083724511 is a prime.

It is a super-2 number, since 2×78181083724513² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78181083724511) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 248822583 + ... + 249136588.

It is an arithmetic number, because the mean of its divisors is an integer number (6095020265280).

Almost surely, 2^{78181083724513} is an apocalyptic number.

It is an amenable number.

78181083724513 is a deficient number, since it is larger than the sum of its proper divisors (19339240519967).

78181083724513 is a wasteful number, since it uses less digits than its factorization.

78181083724513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 497961228.

The product of its (nonzero) digits is 9031680, while the sum is 58.

The spelling of 78181083724513 in words is "seventy-eight trillion, one hundred eighty-one billion, eighty-three million, seven hundred twenty-four thousand, five hundred thirteen".