61435509669 has 32 divisors (see below), whose sum is σ = 93670853760. Its totient is φ = 39773147904.

The previous prime is 61435509659. The next prime is 61435509713. The reversal of 61435509669 is 96690553416.

61435509669 is a `hidden beast` number, since 61 + 435 + 5 + 0 + 96 + 69 = 666.

It is not a de Polignac number, because 61435509669 - 2¹⁵ = 61435476901 is a prime.

It is a super-2 number, since 2×61435509669² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61435509659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 47917 + ... + 353789.

It is an arithmetic number, because the mean of its divisors is an integer number (2927214180).

Almost surely, 2^61435509669 is an apocalyptic number.

It is an amenable number.

61435509669 is a deficient number, since it is larger than the sum of its proper divisors (32235344091).

61435509669 is a wasteful number, since it uses less digits than its factorization.

61435509669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306098 (or 306092 counting only the distinct ones).

The product of its (nonzero) digits is 5248800, while the sum is 54.

The spelling of 61435509669 in words is "sixty-one billion, four hundred thirty-five million, five hundred nine thousand, six hundred sixty-nine".