74278658361601 has 4 divisors (see below), whose sum is σ = 77508165246912. Its totient is φ = 71049151476292.

The previous prime is 74278658361541. The next prime is 74278658361613. The reversal of 74278658361601 is 10616385687247.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 74278658361601 - 2²³ = 74278649972993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74278658361671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1614753442621 + ... + 1614753442666.

It is an arithmetic number, because the mean of its divisors is an integer number (19377041311728).

Almost surely, 2^{74278658361601} is an apocalyptic number.

It is an amenable number.

74278658361601 is a deficient number, since it is larger than the sum of its proper divisors (3229506885311).

74278658361601 is a wasteful number, since it uses less digits than its factorization.

74278658361601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3229506885310.

The product of its (nonzero) digits is 81285120, while the sum is 64.

The spelling of 74278658361601 in words is "seventy-four trillion, two hundred seventy-eight billion, six hundred fifty-eight million, three hundred sixty-one thousand, six hundred one".