78219217403 has 2 divisors, whose sum is σ = 78219217404. Its totient is φ = 78219217402.

The previous prime is 78219217343. The next prime is 78219217477. The reversal of 78219217403 is 30471291287.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78219217403 - 2¹⁰ = 78219216379 is a prime.

It is a super-2 number, since 2×78219217403² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (78219217493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39109608701 + 39109608702.

It is an arithmetic number, because the mean of its divisors is an integer number (39109608702).

Almost surely, 2^78219217403 is an apocalyptic number.

78219217403 is a deficient number, since it is larger than the sum of its proper divisors (1).

78219217403 is an equidigital number, since it uses as much as digits as its factorization.

78219217403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 169344, while the sum is 44.

The spelling of 78219217403 in words is "seventy-eight billion, two hundred nineteen million, two hundred seventeen thousand, four hundred three".