77240597653 has 8 divisors (see below), whose sum is σ = 77922695960. Its totient is φ = 76560906240.

The previous prime is 77240597641. The next prime is 77240597657. The reversal of 77240597653 is 35679504277.

It can be written as a sum of positive squares in 4 ways, for example, as 35697189969 + 41543407684 = 188937^2 + 203822^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77240597653 is a prime.

It is a super-2 number, since 2×77240597653² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 77240597594 and 77240597603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77240597657) 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, 537228 + ... + 665653.

It is an arithmetic number, because the mean of its divisors is an integer number (9740336995).

Almost surely, 2^77240597653 is an apocalyptic number.

It is an amenable number.

77240597653 is a deficient number, since it is larger than the sum of its proper divisors (682098307).

77240597653 is a wasteful number, since it uses less digits than its factorization.

77240597653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1203447.

The product of its (nonzero) digits is 11113200, while the sum is 55.

The spelling of 77240597653 in words is "seventy-seven billion, two hundred forty million, five hundred ninety-seven thousand, six hundred fifty-three".