77671264733 has 4 divisors (see below), whose sum is σ = 79136760348. Its totient is φ = 76205769120.

The previous prime is 77671264711. The next prime is 77671264751. The reversal of 77671264733 is 33746217677.

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 70215460324 + 7455804409 = 264982^2 + 86347^2 .

It is a cyclic number.

It is not a de Polignac number, because 77671264733 - 2¹⁶ = 77671199197 is a prime.

It is a super-2 number, since 2×77671264733² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (53), and also a Moran number because the ratio is a prime number: 1465495561 = 77671264733 / (7 + 7 + 6 + 7 + 1 + 2 + 6 + 4 + 7 + 3 + 3).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77671264633) 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, 732747728 + ... + 732747833.

It is an arithmetic number, because the mean of its divisors is an integer number (19784190087).

Almost surely, 2^77671264733 is an apocalyptic number.

It is an amenable number.

77671264733 is a deficient number, since it is larger than the sum of its proper divisors (1465495615).

77671264733 is a wasteful number, since it uses less digits than its factorization.

77671264733 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1465495614.

The product of its digits is 6223392, while the sum is 53.

The spelling of 77671264733 in words is "seventy-seven billion, six hundred seventy-one million, two hundred sixty-four thousand, seven hundred thirty-three".