1699712640 has 512 divisors, whose sum is σ = 6580224000. Its totient is φ = 413061120.

The previous prime is 1699712639. The next prime is 1699712681. The reversal of 1699712640 is 462179961.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

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, 10177837 + ... + 10178003.

It is an arithmetic number, because the mean of its divisors is an integer number (12852000).

Almost surely, 2^1699712640 is an apocalyptic number.

1699712640 is a gapful number since it is divisible by the number (10) 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 1699712640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3290112000).

1699712640 is an abundant number, since it is smaller than the sum of its proper divisors (4880511360).

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

1699712640 is a wasteful number, since it uses less digits than its factorization.

1699712640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245 (or 227 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 45.

The square root of 1699712640 is about 41227.5713570421. The cubic root of 1699712640 is about 1193.4159412105.

The spelling of 1699712640 in words is "one billion, six hundred ninety-nine million, seven hundred twelve thousand, six hundred forty".