618644649492 has 24 divisors (see below), whose sum is σ = 1603893536000. Its totient is φ = 206214883128.

The previous prime is 618644649487. The next prime is 618644649569. The reversal of 618644649492 is 294946446816.

618644649492 is a `hidden beast` number, since 6 + 1 + 8 + 64 + 46 + 49 + 492 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2864095492 + ... + 2864095707.

Almost surely, 2^618644649492 is an apocalyptic number.

It is an amenable number.

618644649492 is an abundant number, since it is smaller than the sum of its proper divisors (985248886508).

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

618644649492 is a wasteful number, since it uses less digits than its factorization.

618644649492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5728191212 (or 5728191204 counting only the distinct ones).

The product of its digits is 71663616, while the sum is 63.

It can be divided in two parts, 61864464 and 9492, that added together give a square (61873956 = 7866²).

The spelling of 618644649492 in words is "six hundred eighteen billion, six hundred forty-four million, six hundred forty-nine thousand, four hundred ninety-two".