781281363090 has 32 divisors (see below), whose sum is σ = 1875196370880. Its totient is φ = 208328241344.

The previous prime is 781281363077. The next prime is 781281363119. The reversal of 781281363090 is 90363182187.

It is a super-2 number, since 2×781281363090² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 364284 + ... + 1302023.

It is an arithmetic number, because the mean of its divisors is an integer number (58599886590).

Almost surely, 2^781281363090 is an apocalyptic number.

781281363090 is an abundant number, since it is smaller than the sum of its proper divisors (1093915007790).

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

781281363090 is a wasteful number, since it uses less digits than its factorization.

781281363090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1681946.

The product of its (nonzero) digits is 435456, while the sum is 48.

The spelling of 781281363090 in words is "seven hundred eighty-one billion, two hundred eighty-one million, three hundred sixty-three thousand, ninety".