7342536581 has 4 divisors (see below), whose sum is σ = 7391815500. Its totient is φ = 7293257664.

The previous prime is 7342536577. The next prime is 7342536613. The reversal of 7342536581 is 1856352437.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1856352437 = 29 ⋅64012153.

It can be written as a sum of positive squares in 2 ways, for example, as 1326052225 + 6016484356 = 36415^2 + 77566^2 .

It is a cyclic number.

It is not a de Polignac number, because 7342536581 - 2² = 7342536577 is a prime.

It is a super-2 number, since 2×7342536581² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7342533581) 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, 24639236 + ... + 24639533.

It is an arithmetic number, because the mean of its divisors is an integer number (1847953875).

Almost surely, 2^7342536581 is an apocalyptic number.

It is an amenable number.

7342536581 is a deficient number, since it is larger than the sum of its proper divisors (49278919).

7342536581 is a wasteful number, since it uses less digits than its factorization.

7342536581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49278918.

The product of its digits is 604800, while the sum is 44.

The square root of 7342536581 is about 85688.6023984520. The cubic root of 7342536581 is about 1943.6379624549.

The spelling of 7342536581 in words is "seven billion, three hundred forty-two million, five hundred thirty-six thousand, five hundred eighty-one".