61589697515520 has 208 divisors, whose sum is σ = 197080681271040. Its totient is φ = 16422443548672.

The previous prime is 61589697515519. The next prime is 61589697515537. The reversal of 61589697515520 is 2551579698516.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 799111546 + ... + 799188614.

Almost surely, 2^{61589697515520} is an apocalyptic number.

61589697515520 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 61589697515520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98540340635520).

61589697515520 is an abundant number, since it is smaller than the sum of its proper divisors (135490983755520).

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

61589697515520 is a wasteful number, since it uses less digits than its factorization.

61589697515520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90108 (or 90086 counting only the distinct ones).

The product of its (nonzero) digits is 204120000, while the sum is 69.

The spelling of 61589697515520 in words is "sixty-one trillion, five hundred eighty-nine billion, six hundred ninety-seven million, five hundred fifteen thousand, five hundred twenty".