613215230206644 has 72 divisors (see below), whose sum is σ = 1669389214830792. Its totient is φ = 188672443914240.

The previous prime is 613215230206619. The next prime is 613215230206727. The reversal of 613215230206644 is 446602032512316.

613215230206644 is a `hidden beast` number, since 6 + 1 + 3 + 2 + 1 + 523 + 0 + 20 + 66 + 44 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 21047339956644 + 592167890250000 = 4587738^2 + 24334500^2 .

It is a super-3 number, since 3×613215230206644³ (a number of 45 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 613215230206644.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22176417 + ... + 41451464.

Almost surely, 2^{613215230206644} is an apocalyptic number.

It is an amenable number.

613215230206644 is an abundant number, since it is smaller than the sum of its proper divisors (1056173984624148).

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

613215230206644 is a wasteful number, since it uses less digits than its factorization.

613215230206644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63648497 (or 63648492 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 45.

The spelling of 613215230206644 in words is "six hundred thirteen trillion, two hundred fifteen billion, two hundred thirty million, two hundred six thousand, six hundred forty-four".