64779863391360 has 512 divisors, whose sum is σ = 247129188768000. Its totient is φ = 15942447267840.

The previous prime is 64779863391359. The next prime is 64779863391371. The reversal of 64779863391360 is 6319336897746.

64779863391360 is a `hidden beast` number, since 6 + 4 + 7 + 79 + 86 + 33 + 91 + 360 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1163382720 + ... + 1163438400.

Almost surely, 2^{64779863391360} is an apocalyptic number.

64779863391360 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 64779863391360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (123564594384000).

64779863391360 is an abundant number, since it is smaller than the sum of its proper divisors (182349325376640).

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

64779863391360 is a wasteful number, since it uses less digits than its factorization.

64779863391360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60901 (or 60883 counting only the distinct ones).

The product of its (nonzero) digits is 740710656, while the sum is 72.

The spelling of 64779863391360 in words is "sixty-four trillion, seven hundred seventy-nine billion, eight hundred sixty-three million, three hundred ninety-one thousand, three hundred sixty".