613512780 has 48 divisors (see below), whose sum is σ = 1721502720. Its totient is φ = 163254208.

The previous prime is 613512773. The next prime is 613512797. The reversal of 613512780 is 87215316.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18067 + ... + 39413.

It is an arithmetic number, because the mean of its divisors is an integer number (35864640).

Almost surely, 2^613512780 is an apocalyptic number.

613512780 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

613512780 is an abundant number, since it is smaller than the sum of its proper divisors (1107989940).

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

613512780 is a wasteful number, since it uses less digits than its factorization.

613512780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21838 (or 21836 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 33.

The square root of 613512780 is about 24769.1901361349. The cubic root of 613512780 is about 849.7174516480.

It can be divided in two parts, 6135 and 12780, that added together give a triangular number (18915 = T₁₉₄).

The spelling of 613512780 in words is "six hundred thirteen million, five hundred twelve thousand, seven hundred eighty".