61546510530540 has 480 divisors, whose sum is σ = 223927662841344. Its totient is φ = 13859597767680.

The previous prime is 61546510530539. The next prime is 61546510530553. The reversal of 61546510530540 is 4503501564516.

61546510530540 is a `hidden beast` number, since 6 + 1 + 5 + 4 + 6 + 51 + 0 + 53 + 0 + 540 = 666.

It is a super-2 number, since 2×61546510530540² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 750791755 + ... + 750873725.

Almost surely, 2^{61546510530540} is an apocalyptic number.

61546510530540 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 61546510530540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111963831420672).

61546510530540 is an abundant number, since it is smaller than the sum of its proper divisors (162381152310804).

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

61546510530540 is a wasteful number, since it uses less digits than its factorization.

61546510530540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82979 (or 82968 counting only the distinct ones).

The product of its (nonzero) digits is 1080000, while the sum is 45.

The spelling of 61546510530540 in words is "sixty-one trillion, five hundred forty-six billion, five hundred ten million, five hundred thirty thousand, five hundred forty".