77738285523525 has 24 divisors (see below), whose sum is σ = 140211598618464. Its totient is φ = 37691289950400.

The previous prime is 77738285523491. The next prime is 77738285523529. The reversal of 77738285523525 is 52532558283777.

It is not a de Polignac number, because 77738285523525 - 2⁹ = 77738285523013 is a prime.

It is a super-2 number, since 2×77738285523525² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 77738285523525.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77738285523529) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 47114111614 + ... + 47114113263.

It is an arithmetic number, because the mean of its divisors is an integer number (5842149942436).

Almost surely, 2^{77738285523525} is an apocalyptic number.

77738285523525 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

77738285523525 is a deficient number, since it is larger than the sum of its proper divisors (62473313094939).

77738285523525 is a wasteful number, since it uses less digits than its factorization.

77738285523525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94228224901 (or 94228224896 counting only the distinct ones).

The product of its digits is 987840000, while the sum is 69.

The spelling of 77738285523525 in words is "seventy-seven trillion, seven hundred thirty-eight billion, two hundred eighty-five million, five hundred twenty-three thousand, five hundred twenty-five".