61169418240 has 720 divisors, whose sum is σ = 237394555776. Its totient is φ = 13164871680.

The previous prime is 61169418239. The next prime is 61169418287. The reversal of 61169418240 is 4281496116.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 61169418192 and 61169418201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1653227502 + ... + 1653227538.

Almost surely, 2^61169418240 is an apocalyptic number.

61169418240 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 61169418240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (118697277888).

61169418240 is an abundant number, since it is smaller than the sum of its proper divisors (176225137536).

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

61169418240 is an equidigital number, since it uses as much as digits as its factorization.

61169418240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142 (or 85 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 42.

The spelling of 61169418240 in words is "sixty-one billion, one hundred sixty-nine million, four hundred eighteen thousand, two hundred forty".