61513562376 has 560 divisors, whose sum is σ = 211610396160. Its totient is φ = 16723143360.

The previous prime is 61513562371. The next prime is 61513562377. The reversal of 61513562376 is 67326531516.

61513562376 is a `hidden beast` number, since 6 + 1 + 5 + 13 + 5 + 623 + 7 + 6 = 666.

61513562376 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61513562371) by changing a digit.

It is a polite number, since it can be written in 139 ways as a sum of consecutive naturals, for example, 322060441 + ... + 322060631.

Almost surely, 2^61513562376 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61513562376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (105805198080).

61513562376 is an abundant number, since it is smaller than the sum of its proper divisors (150096833784).

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

61513562376 is an equidigital number, since it uses as much as digits as its factorization.

61513562376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266 (or 226 counting only the distinct ones).

The product of its digits is 680400, while the sum is 45.

The spelling of 61513562376 in words is "sixty-one billion, five hundred thirteen million, five hundred sixty-two thousand, three hundred seventy-six".