61805254611 has 8 divisors (see below), whose sum is σ = 82883347920. Its totient is φ = 40965332192.

The previous prime is 61805254597. The next prime is 61805254627. The reversal of 61805254611 is 11645250816.

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 61805254611 - 2¹⁵ = 61805221843 is a prime.

It is a super-2 number, since 2×61805254611² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 61805254611.

It is not an unprimeable number, because it can be changed into a prime (61805254811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59542116 + ... + 59543153.

It is an arithmetic number, because the mean of its divisors is an integer number (10360418490).

Almost surely, 2^61805254611 is an apocalyptic number.

61805254611 is a deficient number, since it is larger than the sum of its proper divisors (21078093309).

61805254611 is a wasteful number, since it uses less digits than its factorization.

61805254611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119085445.

The product of its (nonzero) digits is 57600, while the sum is 39.

The spelling of 61805254611 in words is "sixty-one billion, eight hundred five million, two hundred fifty-four thousand, six hundred eleven".