61519055472 has 300 divisors, whose sum is σ = 207651068856. Its totient is φ = 17532184320.

The previous prime is 61519055471. The next prime is 61519055497. The reversal of 61519055472 is 27455091516.

It is a happy number.

61519055472 is a `hidden beast` number, since 6 + 1 + 5 + 1 + 90 + 554 + 7 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61519055471) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 31179478 + ... + 31181450.

Almost surely, 2^61519055472 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 61519055472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (103825534428).

61519055472 is an abundant number, since it is smaller than the sum of its proper divisors (146132013384).

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

61519055472 is a wasteful number, since it uses less digits than its factorization.

61519055472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2498 (or 2476 counting only the distinct ones).

The product of its (nonzero) digits is 378000, while the sum is 45.

The spelling of 61519055472 in words is "sixty-one billion, five hundred nineteen million, fifty-five thousand, four hundred seventy-two".