611421210972 has 720 divisors, whose sum is σ = 1947804566400. Its totient is φ = 165727710720.

The previous prime is 611421210949. The next prime is 611421210989. The reversal of 611421210972 is 279012124116.

611421210972 is a `hidden beast` number, since 6 + 11 + 421 + 210 + 9 + 7 + 2 = 666.

611421210972 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 (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 239 ways as a sum of consecutive naturals, for example, 4398713679 + ... + 4398713817.

It is an arithmetic number, because the mean of its divisors is an integer number (2705284120).

Almost surely, 2^611421210972 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 611421210972, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (973902283200).

611421210972 is an abundant number, since it is smaller than the sum of its proper divisors (1336383355428).

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

611421210972 is a wasteful number, since it uses less digits than its factorization.

611421210972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 368 (or 344 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The spelling of 611421210972 in words is "six hundred eleven billion, four hundred twenty-one million, two hundred ten thousand, nine hundred seventy-two".