74226278025 has 81 divisors (see below), whose sum is σ = 136577521717. Its totient is φ = 38534620800.

The previous prime is 74226278023. The next prime is 74226278117. The reversal of 74226278025 is 52087262247.

The square root of 74226278025 is 272445.

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 31243037049 + 42983240976 = 176757^2 + 207324^2 .

It is not a de Polignac number, because 74226278025 - 2¹ = 74226278023 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74226278023) by changing a digit.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 167553454 + ... + 167553896.

Almost surely, 2^74226278025 is an apocalyptic number.

74226278025 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

74226278025 is the 272445-th square number.

74226278025 is the 136223-rd centered octagonal number.

It is an amenable number.

74226278025 is a deficient number, since it is larger than the sum of its proper divisors (62351243692).

74226278025 is an equidigital number, since it uses as much as digits as its factorization.

74226278025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 984 (or 492 counting only the distinct ones).

The product of its (nonzero) digits is 752640, while the sum is 45.

The spelling of 74226278025 in words is "seventy-four billion, two hundred twenty-six million, two hundred seventy-eight thousand, twenty-five".