61777783450 has 24 divisors (see below), whose sum is σ = 114928144128. Its totient is φ = 24706496880.

The previous prime is 61777783433. The next prime is 61777783469. The reversal of 61777783450 is 5438777716.

61777783450 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 61777783391 and 61777783400.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 161479 + ... + 386821.

It is an arithmetic number, because the mean of its divisors is an integer number (4788672672).

Almost surely, 2^61777783450 is an apocalyptic number.

61777783450 is a deficient number, since it is larger than the sum of its proper divisors (53150360678).

61777783450 is a wasteful number, since it uses less digits than its factorization.

61777783450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230838 (or 230833 counting only the distinct ones).

The product of its (nonzero) digits is 6914880, while the sum is 55.

The spelling of 61777783450 in words is "sixty-one billion, seven hundred seventy-seven million, seven hundred eighty-three thousand, four hundred fifty".