778425338537 has 32 divisors (see below), whose sum is σ = 1004946739200. Its totient is φ = 585079387200.

The previous prime is 778425338513. The next prime is 778425338557. The reversal of 778425338537 is 735833524877.

It is not a de Polignac number, because 778425338537 - 2⁸ = 778425338281 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 778425338537.

It is not an unprimeable number, because it can be changed into a prime (778425338557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2133164 + ... + 2471282.

It is an arithmetic number, because the mean of its divisors is an integer number (31404585600).

Almost surely, 2^778425338537 is an apocalyptic number.

778425338537 is a gapful number since it is divisible by the number (77) formed by its first and last digit.

It is an amenable number.

778425338537 is a deficient number, since it is larger than the sum of its proper divisors (226521400663).

778425338537 is a wasteful number, since it uses less digits than its factorization.

778425338537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339197.

The product of its digits is 118540800, while the sum is 62.

The spelling of 778425338537 in words is "seven hundred seventy-eight billion, four hundred twenty-five million, three hundred thirty-eight thousand, five hundred thirty-seven".