77861696354 has 16 divisors (see below), whose sum is σ = 126205870392. Its totient is φ = 35813515008.

The previous prime is 77861696333. The next prime is 77861696359. The reversal of 77861696354 is 45369616877.

It can be written as a sum of positive squares in 4 ways, for example, as 76135709329 + 1725987025 = 275927^2 + 41545^2 .

It is not an unprimeable number, because it can be changed into a prime (77861696359) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5102759 + ... + 5117994.

Almost surely, 2^77861696354 is an apocalyptic number.

77861696354 is a deficient number, since it is larger than the sum of its proper divisors (48344174038).

77861696354 is a wasteful number, since it uses less digits than its factorization.

77861696354 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10221061.

The product of its digits is 45722880, while the sum is 62.

The spelling of 77861696354 in words is "seventy-seven billion, eight hundred sixty-one million, six hundred ninety-six thousand, three hundred fifty-four".