68877378025 has 9 divisors (see below), whose sum is σ = 85409575941. Its totient is φ = 55100852640.

The previous prime is 68877378013. The next prime is 68877378043. The reversal of 68877378025 is 52087377886.

The square root of 68877378025 is 262445.

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 16456528089 + 52420849936 = 128283^2 + 228956^2 .

It is not a de Polignac number, because 68877378025 - 2¹³ = 68877369833 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1285981 + ... + 1338469.

Almost surely, 2^68877378025 is an apocalyptic number.

68877378025 is the 262445-th square number.

68877378025 is the 131223-rd centered octagonal number.

It is an amenable number.

68877378025 is a deficient number, since it is larger than the sum of its proper divisors (16532197916).

68877378025 is an frugal number, since it uses more digits than its factorization.

68877378025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104988 (or 52494 counting only the distinct ones).

The product of its (nonzero) digits is 31610880, while the sum is 61.

The spelling of 68877378025 in words is "sixty-eight billion, eight hundred seventy-seven million, three hundred seventy-eight thousand, twenty-five".