61089619734 has 96 divisors (see below), whose sum is σ = 155642183424. Its totient is φ = 17072475840.

The previous prime is 61089619727. The next prime is 61089619739. The reversal of 61089619734 is 43791698016.

61089619734 is a `hidden beast` number, since 6 + 10 + 8 + 9 + 619 + 7 + 3 + 4 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61089619739) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2983359 + ... + 3003765.

It is an arithmetic number, because the mean of its divisors is an integer number (1621272744).

Almost surely, 2^61089619734 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61089619734, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77821091712).

61089619734 is an abundant number, since it is smaller than the sum of its proper divisors (94552563690).

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

61089619734 is a wasteful number, since it uses less digits than its factorization.

61089619734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21602 (or 21599 counting only the distinct ones).

The product of its (nonzero) digits is 1959552, while the sum is 54.

The spelling of 61089619734 in words is "sixty-one billion, eighty-nine million, six hundred nineteen thousand, seven hundred thirty-four".