77738285523541 has 4 divisors (see below), whose sum is σ = 77738310513612. Its totient is φ = 77738260533472.

The previous prime is 77738285523529. The next prime is 77738285523559. The reversal of 77738285523541 is 14532558283777.

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 36253994434641 + 41484291088900 = 6021129^2 + 6440830^2 .

It is a cyclic number.

It is not a de Polignac number, because 77738285523541 - 2¹³ = 77738285515349 is a prime.

It is a super-2 number, since 2×77738285523541² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77738285523341) 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, 7033000 + ... + 14315713.

It is an arithmetic number, because the mean of its divisors is an integer number (19434577628403).

Almost surely, 2^{77738285523541} is an apocalyptic number.

It is an amenable number.

77738285523541 is a deficient number, since it is larger than the sum of its proper divisors (24990071).

77738285523541 is a wasteful number, since it uses less digits than its factorization.

77738285523541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24990070.

The product of its digits is 395136000, while the sum is 67.

The spelling of 77738285523541 in words is "seventy-seven trillion, seven hundred thirty-eight billion, two hundred eighty-five million, five hundred twenty-three thousand, five hundred forty-one".