77061625450 has 12 divisors (see below), whose sum is σ = 143334623430. Its totient is φ = 30824650160.

The previous prime is 77061625439. The next prime is 77061625471. The reversal of 77061625450 is 5452616077.

It can be written as a sum of positive squares in 3 ways, for example, as 60286454089 + 16775171361 = 245533^2 + 129519^2 .

It is a junction number, because it is equal to n+sod(n) for n = 77061625397 and 77061625406.

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 5 ways as a sum of consecutive naturals, for example, 770616205 + ... + 770616304.

Almost surely, 2^77061625450 is an apocalyptic number.

77061625450 is a deficient number, since it is larger than the sum of its proper divisors (66272997980).

77061625450 is a wasteful number, since it uses less digits than its factorization.

77061625450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1541232521 (or 1541232516 counting only the distinct ones).

The product of its (nonzero) digits is 352800, while the sum is 43.

The spelling of 77061625450 in words is "seventy-seven billion, sixty-one million, six hundred twenty-five thousand, four hundred fifty".