78079201619 has 4 divisors (see below), whose sum is σ = 78079804560. Its totient is φ = 78078598680.

The previous prime is 78079201591. The next prime is 78079201633. The reversal of 78079201619 is 91610297087.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 91610297087 = 103837 ⋅882251.

It is a cyclic number.

It is not a de Polignac number, because 78079201619 - 2⁸ = 78079201363 is a prime.

It is a super-2 number, since 2×78079201619² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78079201639) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19004 + ... + 395625.

It is an arithmetic number, because the mean of its divisors is an integer number (19519951140).

Almost surely, 2^78079201619 is an apocalyptic number.

78079201619 is a deficient number, since it is larger than the sum of its proper divisors (602941).

78079201619 is a wasteful number, since it uses less digits than its factorization.

78079201619 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 602940.

The product of its (nonzero) digits is 381024, while the sum is 50.

The spelling of 78079201619 in words is "seventy-eight billion, seventy-nine million, two hundred one thousand, six hundred nineteen".