61520126140 has 48 divisors (see below), whose sum is σ = 145796928480. Its totient is φ = 21599540480.

The previous prime is 61520126089. The next prime is 61520126159. The reversal of 61520126140 is 4162102516.

It is a super-2 number, since 2×61520126140² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 61520126099 and 61520126108.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4814947 + ... + 4827706.

It is an arithmetic number, because the mean of its divisors is an integer number (3037436010).

Almost surely, 2^61520126140 is an apocalyptic number.

It is an amenable number.

61520126140 is an abundant number, since it is smaller than the sum of its proper divisors (84276802340).

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

61520126140 is a wasteful number, since it uses less digits than its factorization.

61520126140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9642702 (or 9642700 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 28.

Adding to 61520126140 its reverse (4162102516), we get a palindrome (65682228656).

The spelling of 61520126140 in words is "sixty-one billion, five hundred twenty million, one hundred twenty-six thousand, one hundred forty".