61020501768 has 144 divisors (see below), whose sum is σ = 173292924480. Its totient is φ = 20140905312.

The previous prime is 61020501749. The next prime is 61020501769. The reversal of 61020501768 is 86710502016.

61020501768 is a `hidden beast` number, since 61 + 0 + 20 + 501 + 76 + 8 = 666.

61020501768 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×61020501768² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (61020501769) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 5400621 + ... + 5411907.

Almost surely, 2^61020501768 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 61020501768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86646462240).

61020501768 is an abundant number, since it is smaller than the sum of its proper divisors (112272422712).

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

61020501768 is a wasteful number, since it uses less digits than its factorization.

61020501768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11420 (or 11395 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The spelling of 61020501768 in words is "sixty-one billion, twenty million, five hundred one thousand, seven hundred sixty-eight".