61520577510 has 96 divisors (see below), whose sum is σ = 171848844000. Its totient is φ = 14054197248.

The previous prime is 61520577463. The next prime is 61520577511. The reversal of 61520577510 is 1577502516.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61520577511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2954616 + ... + 2975364.

It is an arithmetic number, because the mean of its divisors is an integer number (1790092125).

Almost surely, 2^61520577510 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61520577510, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85924422000).

61520577510 is an abundant number, since it is smaller than the sum of its proper divisors (110328266490).

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

61520577510 is a wasteful number, since it uses less digits than its factorization.

61520577510 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22790 (or 22783 counting only the distinct ones).

The product of its (nonzero) digits is 73500, while the sum is 39.

The spelling of 61520577510 in words is "sixty-one billion, five hundred twenty million, five hundred seventy-seven thousand, five hundred ten".