77755280053 has 4 divisors (see below), whose sum is σ = 84823941888. Its totient is φ = 70686618220.

The previous prime is 77755280023. The next prime is 77755280063. The reversal of 77755280053 is 35008255777.

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 77755280053 - 2¹³ = 77755271861 is a prime.

It is a super-2 number, since 2×77755280053² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 77755279979 and 77755280006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77755280003) 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, 3534330901 + ... + 3534330922.

It is an arithmetic number, because the mean of its divisors is an integer number (21205985472).

Almost surely, 2^77755280053 is an apocalyptic number.

It is an amenable number.

77755280053 is a deficient number, since it is larger than the sum of its proper divisors (7068661835).

77755280053 is a wasteful number, since it uses less digits than its factorization.

77755280053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7068661834.

The product of its (nonzero) digits is 2058000, while the sum is 49.

The spelling of 77755280053 in words is "seventy-seven billion, seven hundred fifty-five million, two hundred eighty thousand, fifty-three".