61728890153 has 4 divisors (see below), whose sum is σ = 70547303040. Its totient is φ = 52910477268.

The previous prime is 61728890149. The next prime is 61728890189. The reversal of 61728890153 is 35109882716.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 61728890153 - 2² = 61728890149 is a prime.

It is a super-2 number, since 2×61728890153² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61728890953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4409206433 + ... + 4409206446.

It is an arithmetic number, because the mean of its divisors is an integer number (17636825760).

Almost surely, 2^61728890153 is an apocalyptic number.

It is an amenable number.

61728890153 is a deficient number, since it is larger than the sum of its proper divisors (8818412887).

61728890153 is an equidigital number, since it uses as much as digits as its factorization.

61728890153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8818412886.

The product of its (nonzero) digits is 725760, while the sum is 50.

The spelling of 61728890153 in words is "sixty-one billion, seven hundred twenty-eight million, eight hundred ninety thousand, one hundred fifty-three".