693457640640 has 1120 divisors, whose sum is σ = 2777434038720. Its totient is φ = 163201941504.

The previous prime is 693457640597. The next prime is 693457640651. The reversal of 693457640640 is 46046754396.

It is a happy number.

693457640640 is a `hidden beast` number, since 6 + 9 + 3 + 4 + 576 + 4 + 0 + 64 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 946053714 + ... + 946054446.

Almost surely, 2^693457640640 is an apocalyptic number.

693457640640 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 693457640640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1388717019360).

693457640640 is an abundant number, since it is smaller than the sum of its proper divisors (2083976398080).

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

693457640640 is a wasteful number, since it uses less digits than its factorization.

693457640640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 911 (or 892 counting only the distinct ones).

The product of its (nonzero) digits is 13063680, while the sum is 54.

The spelling of 693457640640 in words is "six hundred ninety-three billion, four hundred fifty-seven million, six hundred forty thousand, six hundred forty".