78881571650397 has 16 divisors (see below), whose sum is σ = 105217981056000. Its totient is φ = 52566440209584.

The previous prime is 78881571650381. The next prime is 78881571650411. The reversal of 78881571650397 is 79305617518887.

It is not a de Polignac number, because 78881571650397 - 2⁴ = 78881571650381 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78881571650377) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 177535804 + ... + 177979562.

It is an arithmetic number, because the mean of its divisors is an integer number (6576123816000).

Almost surely, 2^{78881571650397} is an apocalyptic number.

It is an amenable number.

78881571650397 is a deficient number, since it is larger than the sum of its proper divisors (26336409405603).

78881571650397 is a wasteful number, since it uses less digits than its factorization.

78881571650397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 467600.

The product of its (nonzero) digits is 711244800, while the sum is 75.

The spelling of 78881571650397 in words is "seventy-eight trillion, eight hundred eighty-one billion, five hundred seventy-one million, six hundred fifty thousand, three hundred ninety-seven".