77613562650 has 144 divisors (see below), whose sum is σ = 219398055840. Its totient is φ = 18099244800.

The previous prime is 77613562603. The next prime is 77613562651. The reversal of 77613562650 is 5626531677.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 77613562650.

It is not an unprimeable number, because it can be changed into a prime (77613562651) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 401080 + ... + 562220.

It is an arithmetic number, because the mean of its divisors is an integer number (1523597610).

Almost surely, 2^77613562650 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 77613562650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (109699027920).

77613562650 is an abundant number, since it is smaller than the sum of its proper divisors (141784493190).

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

77613562650 is a wasteful number, since it uses less digits than its factorization.

77613562650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161201 (or 161183 counting only the distinct ones).

The product of its (nonzero) digits is 1587600, while the sum is 48.

The spelling of 77613562650 in words is "seventy-seven billion, six hundred thirteen million, five hundred sixty-two thousand, six hundred fifty".