77652771401 has 4 divisors (see below), whose sum is σ = 77986045332. Its totient is φ = 77319497472.

The previous prime is 77652771349. The next prime is 77652771437. The reversal of 77652771401 is 10417725677.

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 44755518025 + 32897253376 = 211555^2 + 181376^2 .

It is a cyclic number.

It is not a de Polignac number, because 77652771401 - 2¹⁴ = 77652755017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77652771491) 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, 166636616 + ... + 166637081.

It is an arithmetic number, because the mean of its divisors is an integer number (19496511333).

Almost surely, 2^77652771401 is an apocalyptic number.

It is an amenable number.

77652771401 is a deficient number, since it is larger than the sum of its proper divisors (333273931).

77652771401 is a wasteful number, since it uses less digits than its factorization.

77652771401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333273930.

The product of its (nonzero) digits is 576240, while the sum is 47.

The spelling of 77652771401 in words is "seventy-seven billion, six hundred fifty-two million, seven hundred seventy-one thousand, four hundred one".