61530420463140 has 96 divisors (see below), whose sum is σ = 178233599537280. Its totient is φ = 15841643682816.

The previous prime is 61530420463121. The next prime is 61530420463147. The reversal of 61530420463140 is 4136402403516.

It is not an unprimeable number, because it can be changed into a prime (61530420463147) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 40982559 + ... + 42457401.

It is an arithmetic number, because the mean of its divisors is an integer number (1856599995180).

Almost surely, 2^{61530420463140} is an apocalyptic number.

61530420463140 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61530420463140 is an abundant number, since it is smaller than the sum of its proper divisors (116703179074140).

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

61530420463140 is a wasteful number, since it uses less digits than its factorization.

61530420463140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1498861 (or 1498859 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 39.

Adding to 61530420463140 its reverse (4136402403516), we get a palindrome (65666822866656).

The spelling of 61530420463140 in words is "sixty-one trillion, five hundred thirty billion, four hundred twenty million, four hundred sixty-three thousand, one hundred forty".