77553308532557 has 16 divisors (see below), whose sum is σ = 91433528346048. Its totient is φ = 64849735831680.

The previous prime is 77553308532547. The next prime is 77553308532563. The reversal of 77553308532557 is 75523580335577.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 77553308532557 - 2¹² = 77553308528461 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 77553308532493 and 77553308532502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77553308532517) 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, 958141208 + ... + 958222145.

It is an arithmetic number, because the mean of its divisors is an integer number (5714595521628).

Almost surely, 2^{77553308532557} is an apocalyptic number.

It is an amenable number.

77553308532557 is a deficient number, since it is larger than the sum of its proper divisors (13880219813491).

77553308532557 is a wasteful number, since it uses less digits than its factorization.

77553308532557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1916363660.

The product of its (nonzero) digits is 463050000, while the sum is 65.

The spelling of 77553308532557 in words is "seventy-seven trillion, five hundred fifty-three billion, three hundred eight million, five hundred thirty-two thousand, five hundred fifty-seven".