61097089536 has 720 divisors, whose sum is σ = 218901114432. Its totient is φ = 16661790720.

The previous prime is 61097089519. The next prime is 61097089549. The reversal of 61097089536 is 63598079016.

61097089536 is a `hidden beast` number, since 6 + 10 + 97 + 0 + 8 + 9 + 536 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 836946396 + ... + 836946468.

Almost surely, 2^61097089536 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 61097089536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (109450557216).

61097089536 is an abundant number, since it is smaller than the sum of its proper divisors (157804024896).

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

61097089536 is an frugal number, since it uses more digits than its factorization.

61097089536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175 (or 116 counting only the distinct ones).

The product of its (nonzero) digits is 2449440, while the sum is 54.

The spelling of 61097089536 in words is "sixty-one billion, ninety-seven million, eighty-nine thousand, five hundred thirty-six".