781480617362 has 4 divisors (see below), whose sum is σ = 1172220926046. Its totient is φ = 390740308680.

The previous prime is 781480617353. The next prime is 781480617367. The reversal of 781480617362 is 263716084187.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 263716084187 = 1801 ⋅146427587.

It can be written as a sum of positive squares in only one way, i.e., 518156668561 + 263323948801 = 719831^2 + 513151^2 .

It is a super-4 number, since 4×781480617362⁴ (a number of 49 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (781480617367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 195370154339 + ... + 195370154342.

Almost surely, 2^781480617362 is an apocalyptic number.

781480617362 is a deficient number, since it is larger than the sum of its proper divisors (390740308684).

781480617362 is a wasteful number, since it uses less digits than its factorization.

781480617362 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390740308683.

The product of its (nonzero) digits is 2709504, while the sum is 53.

The spelling of 781480617362 in words is "seven hundred eighty-one billion, four hundred eighty million, six hundred seventeen thousand, three hundred sixty-two".