772725627521 has 4 divisors (see below), whose sum is σ = 772738090944. Its totient is φ = 772713164100.

The previous prime is 772725627493. The next prime is 772725627523. The reversal of 772725627521 is 125726527277.

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 an emirpimes, since its reverse is a distinct semiprime: 125726527277 = 13 ⋅9671271329.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-772725627521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (772725627523) 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, 6138245 + ... + 6262866.

It is an arithmetic number, because the mean of its divisors is an integer number (193184522736).

Almost surely, 2^772725627521 is an apocalyptic number.

It is an amenable number.

772725627521 is a deficient number, since it is larger than the sum of its proper divisors (12463423).

772725627521 is a wasteful number, since it uses less digits than its factorization.

772725627521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12463422.

The product of its digits is 5762400, while the sum is 53.

The spelling of 772725627521 in words is "seven hundred seventy-two billion, seven hundred twenty-five million, six hundred twenty-seven thousand, five hundred twenty-one".