77423368893025 has 27 divisors (see below), whose sum is σ = 97342167596601. Its totient is φ = 61087685711040.

The previous prime is 77423368893011. The next prime is 77423368893037. The reversal of 77423368893025 is 52039886332477.

The square root of 77423368893025 is 8799055.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 423656490321 + 76999712402704 = 650889^2 + 8774948^2 .

It is not a de Polignac number, because 77423368893025 - 2¹¹ = 77423368890977 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 3211643022 + ... + 3211667128.

Almost surely, 2^{77423368893025} is an apocalyptic number.

77423368893025 is the 8799055-th square number.

77423368893025 is the 4399528-th centered octagonal number.

It is an amenable number.

77423368893025 is a deficient number, since it is larger than the sum of its proper divisors (19918798703576).

77423368893025 is an frugal number, since it uses more digits than its factorization.

77423368893025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48370 (or 24185 counting only the distinct ones).

The product of its (nonzero) digits is 365783040, while the sum is 67.

The spelling of 77423368893025 in words is "seventy-seven trillion, four hundred twenty-three billion, three hundred sixty-eight million, eight hundred ninety-three thousand, twenty-five".