618910869968 has 10 divisors (see below), whose sum is σ = 1199139810594. Its totient is φ = 309455434976.

The previous prime is 618910869953. The next prime is 618910869989. The reversal of 618910869968 is 869968019816.

It can be written as a sum of positive squares in only one way, i.e., 614925725584 + 3985144384 = 784172^2 + 63128^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19340964671 + ... + 19340964702.

Almost surely, 2^618910869968 is an apocalyptic number.

It is an amenable number.

618910869968 is a deficient number, since it is larger than the sum of its proper divisors (580228940626).

618910869968 is a wasteful number, since it uses less digits than its factorization.

618910869968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38681929381 (or 38681929375 counting only the distinct ones).

The product of its (nonzero) digits is 80621568, while the sum is 71.

The spelling of 618910869968 in words is "six hundred eighteen billion, nine hundred ten million, eight hundred sixty-nine thousand, nine hundred sixty-eight".