61729024769 has 4 divisors (see below), whose sum is σ = 63857611860. Its totient is φ = 59600437680.

The previous prime is 61729024757. The next prime is 61729024783. The reversal of 61729024769 is 96742092716.

61729024769 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 16521760369 + 45207264400 = 128537^2 + 212620^2 .

It is a cyclic number.

It is not a de Polignac number, because 61729024769 - 2¹² = 61729020673 is a prime.

It is a super-2 number, since 2×61729024769² (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 61729024769.

It is not an unprimeable number, because it can be changed into a prime (61729024169) 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, 1064293502 + ... + 1064293559.

It is an arithmetic number, because the mean of its divisors is an integer number (15964402965).

Almost surely, 2^61729024769 is an apocalyptic number.

It is an amenable number.

61729024769 is a deficient number, since it is larger than the sum of its proper divisors (2128587091).

61729024769 is a wasteful number, since it uses less digits than its factorization.

61729024769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2128587090.

The product of its (nonzero) digits is 2286144, while the sum is 53.

The spelling of 61729024769 in words is "sixty-one billion, seven hundred twenty-nine million, twenty-four thousand, seven hundred sixty-nine".