61819454680 has 16 divisors (see below), whose sum is σ = 139093773120. Its totient is φ = 24727781856.

The previous prime is 61819454677. The next prime is 61819454693. The reversal of 61819454680 is 8645491816.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 772743144 + ... + 772743223.

It is an arithmetic number, because the mean of its divisors is an integer number (8693360820).

Almost surely, 2^61819454680 is an apocalyptic number.

It is an amenable number.

61819454680 is an abundant number, since it is smaller than the sum of its proper divisors (77274318440).

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

61819454680 is a wasteful number, since it uses less digits than its factorization.

61819454680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1545486378 (or 1545486374 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 52.

The spelling of 61819454680 in words is "sixty-one billion, eight hundred nineteen million, four hundred fifty-four thousand, six hundred eighty".