78643007254 has 32 divisors (see below), whose sum is σ = 135420719616. Its totient is φ = 33553248000.

The previous prime is 78643007249. The next prime is 78643007269. The reversal of 78643007254 is 45270034687.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9332487 + ... + 9340909.

It is an arithmetic number, because the mean of its divisors is an integer number (4231897488).

Almost surely, 2^78643007254 is an apocalyptic number.

78643007254 is a deficient number, since it is larger than the sum of its proper divisors (56777712362).

78643007254 is a wasteful number, since it uses less digits than its factorization.

78643007254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11340.

The product of its (nonzero) digits is 1128960, while the sum is 46.

The spelling of 78643007254 in words is "seventy-eight billion, six hundred forty-three million, seven thousand, two hundred fifty-four".