77242436661345 has 16 divisors (see below), whose sum is σ = 130857775050240. Its totient is φ = 38772674088704.

The previous prime is 77242436661331. The next prime is 77242436661347. The reversal of 77242436661345 is 54316663424277.

It is a cyclic number.

It is not a de Polignac number, because 77242436661345 - 2¹³ = 77242436653153 is a prime.

It is a super-2 number, since 2×77242436661345² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (77242436661347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 151455757905 + ... + 151455758414.

It is an arithmetic number, because the mean of its divisors is an integer number (8178610940640).

Almost surely, 2^{77242436661345} is an apocalyptic number.

It is an amenable number.

77242436661345 is a deficient number, since it is larger than the sum of its proper divisors (53615338388895).

77242436661345 is a wasteful number, since it uses less digits than its factorization.

77242436661345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302911516344.

The product of its digits is 121927680, while the sum is 60.

The spelling of 77242436661345 in words is "seventy-seven trillion, two hundred forty-two billion, four hundred thirty-six million, six hundred sixty-one thousand, three hundred forty-five".