61590331549 has 4 divisors (see below), whose sum is σ = 61595489340. Its totient is φ = 61585173760.

The previous prime is 61590331541. The next prime is 61590331591. The reversal of 61590331549 is 94513309516.

61590331549 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.

It can be written as a sum of positive squares in 2 ways, for example, as 21902520025 + 39687811524 = 147995^2 + 199218^2 .

It is a cyclic number.

It is not a de Polignac number, because 61590331549 - 2³ = 61590331541 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61590331499 and 61590331508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61590331541) 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, 2560942 + ... + 2584879.

It is an arithmetic number, because the mean of its divisors is an integer number (15398872335).

Almost surely, 2^61590331549 is an apocalyptic number.

It is an amenable number.

61590331549 is a deficient number, since it is larger than the sum of its proper divisors (5157791).

61590331549 is a wasteful number, since it uses less digits than its factorization.

61590331549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5157790.

The product of its (nonzero) digits is 437400, while the sum is 46.

The spelling of 61590331549 in words is "sixty-one billion, five hundred ninety million, three hundred thirty-one thousand, five hundred forty-nine".