61399060800 has 672 divisors, whose sum is σ = 252484030464. Its totient is φ = 12690432000.

The previous prime is 61399060783. The next prime is 61399060867. The reversal of 61399060800 is 806099316.

It is a tau number, because it is divible by the number of its divisors (672).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 100161294 + ... + 100161906.

Almost surely, 2^61399060800 is an apocalyptic number.

61399060800 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 61399060800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (126242015232).

61399060800 is an abundant number, since it is smaller than the sum of its proper divisors (191084969664).

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

61399060800 is a wasteful number, since it uses less digits than its factorization.

61399060800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 927 (or 912 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 42.

The spelling of 61399060800 in words is "sixty-one billion, three hundred ninety-nine million, sixty thousand, eight hundred".