61511437130 has 128 divisors (see below), whose sum is σ = 137084161536. Its totient is φ = 19552896000.

The previous prime is 61511437111. The next prime is 61511437147. The reversal of 61511437130 is 3173411516.

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 63 ways as a sum of consecutive naturals, for example, 3312632 + ... + 3331148.

It is an arithmetic number, because the mean of its divisors is an integer number (1070970012).

Almost surely, 2^61511437130 is an apocalyptic number.

61511437130 is an abundant number, since it is smaller than the sum of its proper divisors (75572724406).

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

61511437130 is a wasteful number, since it uses less digits than its factorization.

61511437130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18672.

The product of its (nonzero) digits is 7560, while the sum is 32.

Adding to 61511437130 its reverse (3173411516), we get a palindrome (64684848646).

The spelling of 61511437130 in words is "sixty-one billion, five hundred eleven million, four hundred thirty-seven thousand, one hundred thirty".