780012375858 has 40 divisors (see below), whose sum is σ = 1749453213420. Its totient is φ = 259759012320.

The previous prime is 780012375851. The next prime is 780012375881. The reversal of 780012375858 is 858573210087.

It can be written as a sum of positive squares in 2 ways, for example, as 743031932049 + 36980443809 = 861993^2 + 192303^2 .

It is a super-2 number, since 2×780012375858² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (780012375851) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2097153 + ... + 2440916.

Almost surely, 2^780012375858 is an apocalyptic number.

780012375858 is an abundant number, since it is smaller than the sum of its proper divisors (969440837562).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

780012375858 is a wasteful number, since it uses less digits than its factorization.

780012375858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4539144 (or 4539135 counting only the distinct ones).

The product of its (nonzero) digits is 3763200, while the sum is 54.

The spelling of 780012375858 in words is "seven hundred eighty billion, twelve million, three hundred seventy-five thousand, eight hundred fifty-eight".