61154648940 has 288 divisors, whose sum is σ = 226748035584. Its totient is φ = 12154813440.

The previous prime is 61154648939. The next prime is 61154648983. The reversal of 61154648940 is 4984645116.

It is a self number, because there is not a number n which added to its sum of digits gives 61154648940.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 702712 + ... + 784928.

It is an arithmetic number, because the mean of its divisors is an integer number (787319568).

Almost surely, 2^61154648940 is an apocalyptic number.

61154648940 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 61154648940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (113374017792).

61154648940 is an abundant number, since it is smaller than the sum of its proper divisors (165593386644).

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

61154648940 is a wasteful number, since it uses less digits than its factorization.

61154648940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82277 (or 82268 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 48.

The spelling of 61154648940 in words is "sixty-one billion, one hundred fifty-four million, six hundred forty-eight thousand, nine hundred forty".