77738604537657 has 8 divisors (see below), whose sum is σ = 118458825962176. Its totient is φ = 44422059735792.

The previous prime is 77738604537613. The next prime is 77738604537661. The reversal of 77738604537657 is 75673540683777.

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

It is not a de Polignac number, because 77738604537657 - 2¹⁸ = 77738604275513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (77738604517657) 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, 1850919155638 + ... + 1850919155679.

It is an arithmetic number, because the mean of its divisors is an integer number (14807353245272).

Almost surely, 2^{77738604537657} is an apocalyptic number.

It is an amenable number.

77738604537657 is a deficient number, since it is larger than the sum of its proper divisors (40720221424519).

77738604537657 is a wasteful number, since it uses less digits than its factorization.

77738604537657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3701838311327.

The product of its (nonzero) digits is 4356374400, while the sum is 75.

The spelling of 77738604537657 in words is "seventy-seven trillion, seven hundred thirty-eight billion, six hundred four million, five hundred thirty-seven thousand, six hundred fifty-seven".