720939905070 has 1024 divisors, whose sum is σ = 2522559283200. Its totient is φ = 127153152000.

The previous prime is 720939904931. The next prime is 720939905117. The reversal of 720939905070 is 70509939027.

It is a happy number.

It is a super-2 number, since 2×720939905070² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 511 ways as a sum of consecutive naturals, for example, 1642231911 + ... + 1642232349.

It is an arithmetic number, because the mean of its divisors is an integer number (2463436800).

Almost surely, 2^720939905070 is an apocalyptic number.

720939905070 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 720939905070, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1261279641600).

720939905070 is an abundant number, since it is smaller than the sum of its proper divisors (1801619378130).

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

720939905070 is a wasteful number, since it uses less digits than its factorization.

720939905070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 605.

The product of its (nonzero) digits is 1071630, while the sum is 51.

The spelling of 720939905070 in words is "seven hundred twenty billion, nine hundred thirty-nine million, nine hundred five thousand, seventy".