61009191437 has 8 divisors (see below), whose sum is σ = 62240668920. Its totient is φ = 59789847040.

The previous prime is 61009191427. The next prime is 61009191461. The reversal of 61009191437 is 73419190016.

It can be written as a sum of positive squares in 4 ways, for example, as 11206127881 + 49803063556 = 105859^2 + 223166^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61009191437 - 2¹² = 61009187341 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61009191394 and 61009191403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61009191427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3023114 + ... + 3043227.

It is an arithmetic number, because the mean of its divisors is an integer number (7780083615).

Almost surely, 2^61009191437 is an apocalyptic number.

It is an amenable number.

61009191437 is a deficient number, since it is larger than the sum of its proper divisors (1231477483).

61009191437 is a wasteful number, since it uses less digits than its factorization.

61009191437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6066543.

The product of its (nonzero) digits is 40824, while the sum is 41.

The spelling of 61009191437 in words is "sixty-one billion, nine million, one hundred ninety-one thousand, four hundred thirty-seven".