77454871880397 has 16 divisors (see below), whose sum is σ = 119288786640192. Its totient is φ = 44181032088320.

The previous prime is 77454871880387. The next prime is 77454871880411. The reversal of 77454871880397 is 79308817845477.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 77454871880397 - 2¹² = 77454871876301 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77454871880377) 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, 69032862078 + ... + 69032863199.

It is an arithmetic number, because the mean of its divisors is an integer number (7455549165012).

Almost surely, 2^{77454871880397} is an apocalyptic number.

It is an amenable number.

77454871880397 is a deficient number, since it is larger than the sum of its proper divisors (41833914759795).

77454871880397 is a wasteful number, since it uses less digits than its factorization.

77454871880397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138065725308.

The product of its (nonzero) digits is 2655313920, while the sum is 78.

The spelling of 77454871880397 in words is "seventy-seven trillion, four hundred fifty-four billion, eight hundred seventy-one million, eight hundred eighty thousand, three hundred ninety-seven".