4078151855972 has 24 divisors (see below), whose sum is σ = 7384995003960. Its totient is φ = 1968193928960.

The previous prime is 4078151855971. The next prime is 4078151855977. The reversal of 4078151855972 is 2795581518704.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 625073659456 + 3453078196516 = 790616^2 + 1858246^2 .

It is not an unprimeable number, because it can be changed into a prime (4078151855971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4677473 + ... + 5480424.

It is an arithmetic number, because the mean of its divisors is an integer number (307708125165).

Almost surely, 2^{4078151855972} is an apocalyptic number.

It is an amenable number.

4078151855972 is a deficient number, since it is larger than the sum of its proper divisors (3306843147988).

4078151855972 is a wasteful number, since it uses less digits than its factorization.

4078151855972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10161391 (or 10161389 counting only the distinct ones).

The product of its (nonzero) digits is 28224000, while the sum is 62.

The spelling of 4078151855972 in words is "four trillion, seventy-eight billion, one hundred fifty-one million, eight hundred fifty-five thousand, nine hundred seventy-two".