74801565 has 12 divisors (see below), whose sum is σ = 129656124. Its totient is φ = 39894144.

The previous prime is 74801501. The next prime is 74801569. The reversal of 74801565 is 56510847.

It can be written as a sum of positive squares in 2 ways, for example, as 20602521 + 54199044 = 4539^2 + 7362^2 .

It is not a de Polignac number, because 74801565 - 2⁶ = 74801501 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74801569) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 831084 + ... + 831173.

It is an arithmetic number, because the mean of its divisors is an integer number (10804677).

Almost surely, 2^74801565 is an apocalyptic number.

It is an amenable number.

74801565 is a deficient number, since it is larger than the sum of its proper divisors (54854559).

74801565 is a wasteful number, since it uses less digits than its factorization.

74801565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1662268 (or 1662265 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 36.

The square root of 74801565 is about 8648.7897997350. The cubic root of 74801565 is about 421.3440784632.

It can be divided in two parts, 7480 and 1565, that added together give a triangular number (9045 = T₁₃₄).

The spelling of 74801565 in words is "seventy-four million, eight hundred one thousand, five hundred sixty-five".