61765911630 has 96 divisors (see below), whose sum is σ = 162641999520. Its totient is φ = 16260875520.

The previous prime is 61765911619. The next prime is 61765911671. The reversal of 61765911630 is 3611956716.

61765911630 is a `hidden beast` number, since 6 + 1 + 7 + 6 + 5 + 9 + 1 + 1 + 630 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 17246440 + ... + 17250020.

It is an arithmetic number, because the mean of its divisors is an integer number (1694187495).

Almost surely, 2^61765911630 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61765911630, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81320999760).

61765911630 is an abundant number, since it is smaller than the sum of its proper divisors (100876087890).

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

61765911630 is a wasteful number, since it uses less digits than its factorization.

61765911630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5986 (or 5983 counting only the distinct ones).

The product of its (nonzero) digits is 204120, while the sum is 45.

The spelling of 61765911630 in words is "sixty-one billion, seven hundred sixty-five million, nine hundred eleven thousand, six hundred thirty".