61769520000 has 320 divisors, whose sum is σ = 227817387600. Its totient is φ = 16471296000.

The previous prime is 61769519953. The next prime is 61769520017. The reversal of 61769520000 is 2596716.

61769520000 is a `hidden beast` number, since 61 + 76 + 9 + 520 + 0 + 0 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (320).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2145702 + ... + 2174298.

Almost surely, 2^61769520000 is an apocalyptic number.

61769520000 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61769520000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (113908693800).

61769520000 is an abundant number, since it is smaller than the sum of its proper divisors (166047867600).

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

61769520000 is an equidigital number, since it uses as much as digits as its factorization.

61769520000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28640 (or 28607 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The spelling of 61769520000 in words is "sixty-one billion, seven hundred sixty-nine million, five hundred twenty thousand".