61319462400 has 1800 divisors, whose sum is σ = 283467031056. Its totient is φ = 13005619200.

The previous prime is 61319462371. The next prime is 61319462437. The reversal of 61319462400 is 426491316.

61319462400 is a `hidden beast` number, since 6 + 1 + 3 + 194 + 62 + 400 = 666.

It is a tau number, because it is divible by the number of its divisors (1800).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 179 ways as a sum of consecutive naturals, for example, 863654365 + ... + 863654435.

Almost surely, 2^61319462400 is an apocalyptic number.

61319462400 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 61319462400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (141733515528).

61319462400 is an abundant number, since it is smaller than the sum of its proper divisors (222147568656).

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

61319462400 is a wasteful number, since it uses less digits than its factorization.

61319462400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142 (or 105 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The spelling of 61319462400 in words is "sixty-one billion, three hundred nineteen million, four hundred sixty-two thousand, four hundred".