612741562874261 has 4 divisors (see below), whose sum is σ = 612998909186124. Its totient is φ = 612484216562400.

The previous prime is 612741562874257. The next prime is 612741562874267. The reversal of 612741562874261 is 162478265147216.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 219028900140625 + 393712662733636 = 14799625^2 + 19842194^2 .

It is a cyclic number.

It is not a de Polignac number, because 612741562874261 - 2² = 612741562874257 is a prime.

It is a super-2 number, since 2×612741562874261² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 612741562874194 and 612741562874203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (612741562874267) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 128673152360 + ... + 128673157121.

It is an arithmetic number, because the mean of its divisors is an integer number (153249727296531).

Almost surely, 2^{612741562874261} is an apocalyptic number.

It is an amenable number.

612741562874261 is a deficient number, since it is larger than the sum of its proper divisors (257346311863).

612741562874261 is a wasteful number, since it uses less digits than its factorization.

612741562874261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257346311862.

The product of its digits is 54190080, while the sum is 62.

The spelling of 612741562874261 in words is "six hundred twelve trillion, seven hundred forty-one billion, five hundred sixty-two million, eight hundred seventy-four thousand, two hundred sixty-one".