61261333591 has 8 divisors (see below), whose sum is σ = 63383468400. Its totient is φ = 59139843840.

The previous prime is 61261333579. The next prime is 61261333613. The reversal of 61261333591 is 19533316216.

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

It is not a de Polignac number, because 61261333591 - 2¹⁵ = 61261300823 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61261333531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36076 + ... + 351886.

It is an arithmetic number, because the mean of its divisors is an integer number (7922933550).

Almost surely, 2^61261333591 is an apocalyptic number.

61261333591 is a deficient number, since it is larger than the sum of its proper divisors (2122134809).

61261333591 is a wasteful number, since it uses less digits than its factorization.

61261333591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322529.

The product of its digits is 87480, while the sum is 40.

The spelling of 61261333591 in words is "sixty-one billion, two hundred sixty-one million, three hundred thirty-three thousand, five hundred ninety-one".