78578578642954 has 64 divisors (see below), whose sum is σ = 132778946248704. Its totient is φ = 34605036582336.

The previous prime is 78578578642913. The next prime is 78578578643017. The reversal of 78578578642954 is 45924687587587.

It is a super-2 number, since 2×78578578642954² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 740534667 + ... + 740640769.

It is an arithmetic number, because the mean of its divisors is an integer number (2074671035136).

Almost surely, 2^{78578578642954} is an apocalyptic number.

78578578642954 is a deficient number, since it is larger than the sum of its proper divisors (54200367605750).

78578578642954 is a wasteful number, since it uses less digits than its factorization.

78578578642954 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109171.

The product of its digits is 37933056000, while the sum is 85.

The spelling of 78578578642954 in words is "seventy-eight trillion, five hundred seventy-eight billion, five hundred seventy-eight million, six hundred forty-two thousand, nine hundred fifty-four".