78878337826381 has 8 divisors (see below), whose sum is σ = 78904588497120. Its totient is φ = 78852088175952.

The previous prime is 78878337826363. The next prime is 78878337826441. The reversal of 78878337826381 is 18362873387887.

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

It is a cyclic number.

It is not a de Polignac number, because 78878337826381 - 2⁹ = 78878337825869 is a prime.

It is a super-2 number, since 2×78878337826381² (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 (78878337826331) 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, 174077791 + ... + 174530323.

It is an arithmetic number, because the mean of its divisors is an integer number (9863073562140).

Almost surely, 2^{78878337826381} is an apocalyptic number.

It is an amenable number.

78878337826381 is a deficient number, since it is larger than the sum of its proper divisors (26250670739).

78878337826381 is a wasteful number, since it uses less digits than its factorization.

78878337826381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 510155.

The product of its digits is 3641573376, while the sum is 79.

The spelling of 78878337826381 in words is "seventy-eight trillion, eight hundred seventy-eight billion, three hundred thirty-seven million, eight hundred twenty-six thousand, three hundred eighty-one".