781375978248 has 32 divisors (see below), whose sum is σ = 1953474183360. Its totient is φ = 260454094400.

The previous prime is 781375978247. The next prime is 781375978259. The reversal of 781375978248 is 842879573187.

It is a super-2 number, since 2×781375978248² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (781375978241) 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, 1290061 + ... + 1796387.

It is an arithmetic number, because the mean of its divisors is an integer number (61046068230).

Almost surely, 2^781375978248 is an apocalyptic number.

It is an amenable number.

781375978248 is an abundant number, since it is smaller than the sum of its proper divisors (1172098205112).

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

781375978248 is a wasteful number, since it uses less digits than its factorization.

781375978248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 570637 (or 570633 counting only the distinct ones).

The product of its digits is 189665280, while the sum is 69.

The spelling of 781375978248 in words is "seven hundred eighty-one billion, three hundred seventy-five million, nine hundred seventy-eight thousand, two hundred forty-eight".