78954215002 has 16 divisors (see below), whose sum is σ = 131939405640. Its totient is φ = 35183840832.

The previous prime is 78954214931. The next prime is 78954215009. The reversal of 78954215002 is 20051245987.

It can be written as a sum of positive squares in 4 ways, for example, as 39010595121 + 39943619881 = 197511^2 + 199859^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 78954215002.

It is not an unprimeable number, because it can be changed into a prime (78954215009) 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, 52356153 + ... + 52357660.

Almost surely, 2^78954215002 is an apocalyptic number.

78954215002 is a deficient number, since it is larger than the sum of its proper divisors (52985190638).

78954215002 is a wasteful number, since it uses less digits than its factorization.

78954215002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104713857.

The product of its (nonzero) digits is 201600, while the sum is 43.

The spelling of 78954215002 in words is "seventy-eight billion, nine hundred fifty-four million, two hundred fifteen thousand, two".