781237053581964 has 24 divisors (see below), whose sum is σ = 2083298809552128. Its totient is φ = 223210586737680.

The previous prime is 781237053581951. The next prime is 781237053581969. The reversal of 781237053581964 is 469185350732187.

It is a super-2 number, since 2×781237053581964² (a number of 31 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (781237053581969) 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, 4650220556952 + ... + 4650220557119.

It is an arithmetic number, because the mean of its divisors is an integer number (86804117064672).

It is a 3-persistent number, because k⋅781237053581964 is pandigital for 1 ≤ k ≤ 3, but not for k = 4.

Almost surely, 2^{781237053581964} is an apocalyptic number.

It is an amenable number.

781237053581964 is an abundant number, since it is smaller than the sum of its proper divisors (1302061755970164).

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

781237053581964 is a wasteful number, since it uses less digits than its factorization.

781237053581964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9300441114085 (or 9300441114083 counting only the distinct ones).

The product of its (nonzero) digits is 304819200, while the sum is 69.

The spelling of 781237053581964 in words is "seven hundred eighty-one trillion, two hundred thirty-seven billion, fifty-three million, five hundred eighty-one thousand, nine hundred sixty-four".