61797814669 has 4 divisors (see below), whose sum is σ = 62810893660. Its totient is φ = 60784735680.

The previous prime is 61797814667. The next prime is 61797814691. The reversal of 61797814669 is 96641879716.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1579108644 + 60218706025 = 39738^2 + 245395^2 .

It is a cyclic number.

It is not a de Polignac number, because 61797814669 - 2¹ = 61797814667 is a prime.

It is a super-2 number, since 2×61797814669² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61797814669.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61797814667) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 506539404 + ... + 506539525.

It is an arithmetic number, because the mean of its divisors is an integer number (15702723415).

Almost surely, 2^61797814669 is an apocalyptic number.

It is an amenable number.

61797814669 is a deficient number, since it is larger than the sum of its proper divisors (1013078991).

61797814669 is a wasteful number, since it uses less digits than its factorization.

61797814669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1013078990.

The product of its digits is 27433728, while the sum is 64.

The spelling of 61797814669 in words is "sixty-one billion, seven hundred ninety-seven million, eight hundred fourteen thousand, six hundred sixty-nine".