78261031050353 has 4 divisors (see below), whose sum is σ = 78261056674020. Its totient is φ = 78261005426688.

The previous prime is 78261031050343. The next prime is 78261031050421. The reversal of 78261031050353 is 35305013016287.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18975851152384 + 59285179897969 = 4356128^2 + 7699687^2 .

It is a cyclic number.

It is not a de Polignac number, because 78261031050353 - 2²² = 78261026856049 is a prime.

It is a super-2 number, since 2×78261031050353² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78261031050343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7494968 + ... + 14584121.

It is an arithmetic number, because the mean of its divisors is an integer number (19565264168505).

Almost surely, 2^{78261031050353} is an apocalyptic number.

It is an amenable number.

78261031050353 is a deficient number, since it is larger than the sum of its proper divisors (25623667).

78261031050353 is a wasteful number, since it uses less digits than its factorization.

78261031050353 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25623666.

The product of its (nonzero) digits is 453600, while the sum is 44.

The spelling of 78261031050353 in words is "seventy-eight trillion, two hundred sixty-one billion, thirty-one million, fifty thousand, three hundred fifty-three".