718121264 has 160 divisors (see below), whose sum is σ = 1749888000. Its totient is φ = 284497920.

The previous prime is 718121251. The next prime is 718121267. The reversal of 718121264 is 462121817.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 718121264.

It is not an unprimeable number, because it can be changed into a prime (718121267) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7403264 + ... + 7403360.

It is an arithmetic number, because the mean of its divisors is an integer number (10936800).

Almost surely, 2^718121264 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 718121264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (874944000).

718121264 is an abundant number, since it is smaller than the sum of its proper divisors (1031766736).

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

718121264 is a wasteful number, since it uses less digits than its factorization.

718121264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216 (or 196 counting only the distinct ones).

The product of its digits is 5376, while the sum is 32.

The square root of 718121264 is about 26797.7846845593. The cubic root of 718121264 is about 895.5006983752.

The spelling of 718121264 in words is "seven hundred eighteen million, one hundred twenty-one thousand, two hundred sixty-four".