61523430000 has 200 divisors, whose sum is σ = 201977846400. Its totient is φ = 16127712000.

The previous prime is 61523429977. The next prime is 61523430011. The reversal of 61523430000 is 3432516.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (200).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1752621 + ... + 1787379.

It is an arithmetic number, because the mean of its divisors is an integer number (1009889232).

Almost surely, 2^61523430000 is an apocalyptic number.

61523430000 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61523430000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100988923200).

61523430000 is an abundant number, since it is smaller than the sum of its proper divisors (140454416400).

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

61523430000 is a wasteful number, since it uses less digits than its factorization.

61523430000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34849 (or 34828 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 24.

Adding to 61523430000 its reverse (3432516), we get a palindrome (61526862516).

The spelling of 61523430000 in words is "sixty-one billion, five hundred twenty-three million, four hundred thirty thousand".