61145531767 has 8 divisors (see below), whose sum is σ = 63236966400. Its totient is φ = 59087033304.

The previous prime is 61145531761. The next prime is 61145531801. The reversal of 61145531767 is 76713554116.

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 61145531767 - 2¹⁹ = 61145007479 is a prime.

It is a super-2 number, since 2×61145531767² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61145531761) 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, 8230267 + ... + 8237692.

It is an arithmetic number, because the mean of its divisors is an integer number (7904620800).

Almost surely, 2^61145531767 is an apocalyptic number.

61145531767 is a deficient number, since it is larger than the sum of its proper divisors (2091434633).

61145531767 is a wasteful number, since it uses less digits than its factorization.

61145531767 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16468085.

The product of its digits is 529200, while the sum is 46.

The spelling of 61145531767 in words is "sixty-one billion, one hundred forty-five million, five hundred thirty-one thousand, seven hundred sixty-seven".