61590757249 has 4 divisors (see below), whose sum is σ = 70389436864. Its totient is φ = 52792077636.

The previous prime is 61590757169. The next prime is 61590757289. The reversal of 61590757249 is 94275709516.

It is a happy number.

61590757249 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 61590757249 - 2¹⁷ = 61590626177 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61590757249.

It is not an unprimeable number, because it can be changed into a prime (61590757289) 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, 4399339797 + ... + 4399339810.

It is an arithmetic number, because the mean of its divisors is an integer number (17597359216).

Almost surely, 2^61590757249 is an apocalyptic number.

It is an amenable number.

61590757249 is a deficient number, since it is larger than the sum of its proper divisors (8798679615).

61590757249 is an equidigital number, since it uses as much as digits as its factorization.

61590757249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8798679614.

The product of its (nonzero) digits is 4762800, while the sum is 55.

The spelling of 61590757249 in words is "sixty-one billion, five hundred ninety million, seven hundred fifty-seven thousand, two hundred forty-nine".