78910010221 has 16 divisors (see below), whose sum is σ = 90583242880. Its totient is φ = 67337464320.

The previous prime is 78910010183. The next prime is 78910010233. The reversal of 78910010221 is 12201001987.

It is not a de Polignac number, because 78910010221 - 2⁷ = 78910010093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78910010251) 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, 1605865 + ... + 1654273.

It is an arithmetic number, because the mean of its divisors is an integer number (5661452680).

Almost surely, 2^78910010221 is an apocalyptic number.

It is an amenable number.

78910010221 is a deficient number, since it is larger than the sum of its proper divisors (11673232659).

78910010221 is a wasteful number, since it uses less digits than its factorization.

78910010221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49444.

The product of its (nonzero) digits is 2016, while the sum is 31.

The spelling of 78910010221 in words is "seventy-eight billion, nine hundred ten million, ten thousand, two hundred twenty-one".