74681628145 has 16 divisors (see below), whose sum is σ = 89843354640. Its totient is φ = 59595220224.

The previous prime is 74681628143. The next prime is 74681628173. The reversal of 74681628145 is 54182618647.

It can be written as a sum of positive squares in 8 ways, for example, as 788991921 + 73892636224 = 28089^2 + 271832^2 .

It is a cyclic number.

It is not a de Polignac number, because 74681628145 - 2¹ = 74681628143 is a prime.

It is a super-2 number, since 2×74681628145² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 74681628092 and 74681628101.

It is not an unprimeable number, because it can be changed into a prime (74681628143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3479587 + ... + 3500983.

It is an arithmetic number, because the mean of its divisors is an integer number (5615209665).

Almost surely, 2^74681628145 is an apocalyptic number.

It is an amenable number.

74681628145 is a deficient number, since it is larger than the sum of its proper divisors (15161726495).

74681628145 is a wasteful number, since it uses less digits than its factorization.

74681628145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23124.

The product of its digits is 2580480, while the sum is 52.

The spelling of 74681628145 in words is "seventy-four billion, six hundred eighty-one million, six hundred twenty-eight thousand, one hundred forty-five".