61545453245 has 16 divisors (see below), whose sum is σ = 74823793200. Its totient is φ = 48594353664.

The previous prime is 61545453227. The next prime is 61545453317. The reversal of 61545453245 is 54235454516.

It can be written as a sum of positive squares in 8 ways, for example, as 38477209 + 61506976036 = 6203^2 + 248006^2 .

It is a cyclic number.

It is not a de Polignac number, because 61545453245 - 2²² = 61541258941 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61545453196 and 61545453205.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 141170 + ... + 378179.

It is an arithmetic number, because the mean of its divisors is an integer number (4676487075).

Almost surely, 2^61545453245 is an apocalyptic number.

It is an amenable number.

61545453245 is a deficient number, since it is larger than the sum of its proper divisors (13278339955).

61545453245 is a wasteful number, since it uses less digits than its factorization.

61545453245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 519664.

The product of its digits is 1440000, while the sum is 44.

The spelling of 61545453245 in words is "sixty-one billion, five hundred forty-five million, four hundred fifty-three thousand, two hundred forty-five".