61598344320 has 128 divisors (see below), whose sum is σ = 218160864000. Its totient is φ = 16426220544.

The previous prime is 61598344277. The next prime is 61598344321. The reversal of 61598344320 is 2344389516.

61598344320 is a `hidden beast` number, since 6 + 1 + 598 + 34 + 4 + 3 + 20 = 666.

It is a tau number, because it is divible by the number of its divisors (128).

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

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

It is not an unprimeable number, because it can be changed into a prime (61598344321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1765080 + ... + 1799639.

It is an arithmetic number, because the mean of its divisors is an integer number (1704381750).

Almost surely, 2^61598344320 is an apocalyptic number.

61598344320 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61598344320 is an abundant number, since it is smaller than the sum of its proper divisors (156562519680).

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

61598344320 is a wasteful number, since it uses less digits than its factorization.

61598344320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3564747 (or 3564729 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 45.

The spelling of 61598344320 in words is "sixty-one billion, five hundred ninety-eight million, three hundred forty-four thousand, three hundred twenty".