77251427441 has 4 divisors (see below), whose sum is σ = 77304816192. Its totient is φ = 77198038692.

The previous prime is 77251427371. The next prime is 77251427447. The reversal of 77251427441 is 14472415277.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 14472415277 = 1709 ⋅8468353.

It is a cyclic number.

It is not a de Polignac number, because 77251427441 - 2¹⁴ = 77251411057 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 77251427392 and 77251427401.

It is not an unprimeable number, because it can be changed into a prime (77251427447) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26692205 + ... + 26695098.

It is an arithmetic number, because the mean of its divisors is an integer number (19326204048).

Almost surely, 2^77251427441 is an apocalyptic number.

It is an amenable number.

77251427441 is a deficient number, since it is larger than the sum of its proper divisors (53388751).

77251427441 is a wasteful number, since it uses less digits than its factorization.

77251427441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53388750.

The product of its digits is 439040, while the sum is 44.

The spelling of 77251427441 in words is "seventy-seven billion, two hundred fifty-one million, four hundred twenty-seven thousand, four hundred forty-one".