61208739216 has 135 divisors (see below), whose sum is σ = 175042482979. Its totient is φ = 19966492416.

The previous prime is 61208739209. The next prime is 61208739223. The reversal of 61208739216 is 61293780216.

The square root of 61208739216 is 247404.

It is a perfect power (a square), and thus also a powerful number.

61208739216 is a `hidden beast` number, since 612 + 0 + 8 + 7 + 3 + 9 + 21 + 6 = 666.

It is an interprime number because it is at equal distance from previous prime (61208739209) and next prime (61208739223).

It can be written as a sum of positive squares in 4 ways, for example, as 148352400 + 61060386816 = 12180^2 + 247104^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 157348750 + ... + 157349138.

Almost surely, 2^61208739216 is an apocalyptic number.

61208739216 is the 247404-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61208739216

61208739216 is an abundant number, since it is smaller than the sum of its proper divisors (113833743763).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61208739216 is an equidigital number, since it uses as much as digits as its factorization.

61208739216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 898 (or 447 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The spelling of 61208739216 in words is "sixty-one billion, two hundred eight million, seven hundred thirty-nine thousand, two hundred sixteen".