61287731494080 has 896 divisors, whose sum is σ = 250158421094400. Its totient is φ = 12363872403456.

The previous prime is 61287731494049. The next prime is 61287731494097. The reversal of 61287731494080 is 8049413778216.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 260826886 + ... + 261061754.

It is an arithmetic number, because the mean of its divisors is an integer number (279194666400).

Almost surely, 2^{61287731494080} is an apocalyptic number.

61287731494080 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 61287731494080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (125079210547200).

61287731494080 is an abundant number, since it is smaller than the sum of its proper divisors (188870689600320).

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

61287731494080 is a wasteful number, since it uses less digits than its factorization.

61287731494080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235041 (or 235031 counting only the distinct ones).

The product of its (nonzero) digits is 16257024, while the sum is 60.

The spelling of 61287731494080 in words is "sixty-one trillion, two hundred eighty-seven billion, seven hundred thirty-one million, four hundred ninety-four thousand, eighty".