77151367081 has 4 divisors (see below), whose sum is σ = 77168870100. Its totient is φ = 77133864064.

The previous prime is 77151367067. The next prime is 77151367091. The reversal of 77151367081 is 18076315177.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 43645895056 + 33505472025 = 208916^2 + 183045^2 .

It is a cyclic number.

It is not a de Polignac number, because 77151367081 - 2¹¹ = 77151365033 is a prime.

It is a super-2 number, since 2×77151367081² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77151367001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8744896 + ... + 8753713.

It is an arithmetic number, because the mean of its divisors is an integer number (19292217525).

Almost surely, 2^77151367081 is an apocalyptic number.

It is an amenable number.

77151367081 is a deficient number, since it is larger than the sum of its proper divisors (17503019).

77151367081 is a wasteful number, since it uses less digits than its factorization.

77151367081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17503018.

The product of its (nonzero) digits is 246960, while the sum is 46.

The spelling of 77151367081 in words is "seventy-seven billion, one hundred fifty-one million, three hundred sixty-seven thousand, eighty-one".