709997757990 has 96 divisors (see below), whose sum is σ = 1765498325760. Its totient is φ = 182729543808.

The previous prime is 709997757979. The next prime is 709997758013. The reversal of 709997757990 is 99757799907.

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 47 ways as a sum of consecutive naturals, for example, 89789617 + ... + 89797523.

It is an arithmetic number, because the mean of its divisors is an integer number (18390607560).

Almost surely, 2^709997757990 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 709997757990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (882749162880).

709997757990 is an abundant number, since it is smaller than the sum of its proper divisors (1055500567770).

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

709997757990 is a wasteful number, since it uses less digits than its factorization.

709997757990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11534 (or 11505 counting only the distinct ones).

The product of its (nonzero) digits is 708883245, while the sum is 78.

The spelling of 709997757990 in words is "seven hundred nine billion, nine hundred ninety-seven million, seven hundred fifty-seven thousand, nine hundred ninety".