78148640257877 has 8 divisors (see below), whose sum is σ = 89382671225856. Its totient is φ = 66932094165552.

The previous prime is 78148640257847. The next prime is 78148640257903. The reversal of 78148640257877 is 77875204684187.

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

It is not a de Polignac number, because 78148640257877 - 2¹⁸ = 78148639995733 is a prime.

It is a super-2 number, since 2×78148640257877² (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 (78148640257847) 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, 4371209333 + ... + 4371227210.

It is an arithmetic number, because the mean of its divisors is an integer number (11172833903232).

Almost surely, 2^{78148640257877} is an apocalyptic number.

It is an amenable number.

78148640257877 is a deficient number, since it is larger than the sum of its proper divisors (11234030967979).

78148640257877 is a wasteful number, since it uses less digits than its factorization.

78148640257877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8742437827.

The product of its (nonzero) digits is 1180139520, while the sum is 74.

The spelling of 78148640257877 in words is "seventy-eight trillion, one hundred forty-eight billion, six hundred forty million, two hundred fifty-seven thousand, eight hundred seventy-seven".