61878168366367 has 16 divisors (see below), whose sum is σ = 65182887544320. Its totient is φ = 58578254784000.

The previous prime is 61878168366361. The next prime is 61878168366383. The reversal of 61878168366367 is 76366386187816.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 61878168366367 - 2²³ = 61878159977759 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61878168366293 and 61878168366302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61878168366361) 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, 283487242 + ... + 283705432.

It is an arithmetic number, because the mean of its divisors is an integer number (4073930471520).

Almost surely, 2^{61878168366367} is an apocalyptic number.

61878168366367 is a deficient number, since it is larger than the sum of its proper divisors (3304719177953).

61878168366367 is a wasteful number, since it uses less digits than its factorization.

61878168366367 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229134.

The product of its digits is 1755758592, while the sum is 76.

The spelling of 61878168366367 in words is "sixty-one trillion, eight hundred seventy-eight billion, one hundred sixty-eight million, three hundred sixty-six thousand, three hundred sixty-seven".