771451050820 has 48 divisors (see below), whose sum is σ = 1630010285568. Its totient is φ = 306688440960.

The previous prime is 771451050803. The next prime is 771451050841. The reversal of 771451050820 is 28050154177.

It is a super-2 number, since 2×771451050820² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1971265 + ... + 2329975.

It is an arithmetic number, because the mean of its divisors is an integer number (33958547616).

Almost surely, 2^771451050820 is an apocalyptic number.

It is an amenable number.

771451050820 is an abundant number, since it is smaller than the sum of its proper divisors (858559234748).

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

771451050820 is a wasteful number, since it uses less digits than its factorization.

771451050820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359380 (or 359378 counting only the distinct ones).

The product of its (nonzero) digits is 78400, while the sum is 40.

The spelling of 771451050820 in words is "seven hundred seventy-one billion, four hundred fifty-one million, fifty thousand, eight hundred twenty".