61204654668 has 54 divisors (see below), whose sum is σ = 151741775388. Its totient is φ = 19196889600.

The previous prime is 61204654649. The next prime is 61204654673. The reversal of 61204654668 is 86645640216.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 14566968 + ... + 14571168.

Almost surely, 2^61204654668 is an apocalyptic number.

61204654668 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61204654668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75870887694).

61204654668 is an abundant number, since it is smaller than the sum of its proper divisors (90537120720).

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

61204654668 is an equidigital number, since it uses as much as digits as its factorization.

61204654668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8443 (or 4223 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 48.

Multiplying 61204654668 by its sum of digits (48), we get a square (2937823424064 = 1714008²).

The spelling of 61204654668 in words is "sixty-one billion, two hundred four million, six hundred fifty-four thousand, six hundred sixty-eight".