61520376416 has 24 divisors (see below), whose sum is σ = 121177080864. Its totient is φ = 30745244800.

The previous prime is 61520376371. The next prime is 61520376419. The reversal of 61520376416 is 61467302516.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61520376419) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 399935 + ... + 531966.

It is an arithmetic number, because the mean of its divisors is an integer number (5049045036).

Almost surely, 2^61520376416 is an apocalyptic number.

It is an amenable number.

61520376416 is a deficient number, since it is larger than the sum of its proper divisors (59656704448).

61520376416 is a wasteful number, since it uses less digits than its factorization.

61520376416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 933974 (or 933966 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 41.

The spelling of 61520376416 in words is "sixty-one billion, five hundred twenty million, three hundred seventy-six thousand, four hundred sixteen".