611948398864 has 120 divisors (see below), whose sum is σ = 1354958839584. Its totient is φ = 267321331200.

The previous prime is 611948398819. The next prime is 611948398903. The reversal of 611948398864 is 468893849116.

It is a happy number.

611948398864 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (67).

It is a self number, because there is not a number n which added to its sum of digits gives 611948398864.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5260659 + ... + 5375725.

Almost surely, 2^611948398864 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 611948398864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (677479419792).

611948398864 is an abundant number, since it is smaller than the sum of its proper divisors (743010440720).

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

611948398864 is a wasteful number, since it uses less digits than its factorization.

611948398864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115205 (or 115188 counting only the distinct ones).

The product of its digits is 71663616, while the sum is 67.

The spelling of 611948398864 in words is "six hundred eleven billion, nine hundred forty-eight million, three hundred ninety-eight thousand, eight hundred sixty-four".