77253665953 has 4 divisors (see below), whose sum is σ = 77254265088. Its totient is φ = 77253066820.

The previous prime is 77253665939. The next prime is 77253665963. The reversal of 77253665953 is 35956635277.

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 a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 77253665953 - 2⁹ = 77253665441 is a prime.

It is a super-2 number, since 2×77253665953² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77253665933) 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, 17833 + ... + 393478.

It is an arithmetic number, because the mean of its divisors is an integer number (19313566272).

Almost surely, 2^77253665953 is an apocalyptic number.

It is an amenable number.

77253665953 is a deficient number, since it is larger than the sum of its proper divisors (599135).

77253665953 is a wasteful number, since it uses less digits than its factorization.

77253665953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 599134.

The product of its digits is 35721000, while the sum is 58.

The spelling of 77253665953 in words is "seventy-seven billion, two hundred fifty-three million, six hundred sixty-five thousand, nine hundred fifty-three".