855061391280 has 160 divisors (see below), whose sum is σ = 2815800134400. Its totient is φ = 214033591296.

The previous prime is 855061391237. The next prime is 855061391281. The reversal of 855061391280 is 82193160558.

It is a happy number.

It is a super-2 number, since 2×855061391280² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (855061391281) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 363114 + ... + 1357193.

It is an arithmetic number, because the mean of its divisors is an integer number (17598750840).

Almost surely, 2^855061391280 is an apocalyptic number.

855061391280 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

855061391280 is an abundant number, since it is smaller than the sum of its proper divisors (1960738743120).

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

855061391280 is a wasteful number, since it uses less digits than its factorization.

855061391280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1720451 (or 1720445 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 48.

The spelling of 855061391280 in words is "eight hundred fifty-five billion, sixty-one million, three hundred ninety-one thousand, two hundred eighty".