774497687040 has 3840 divisors, whose sum is σ = 3912229601280. Its totient is φ = 141893959680.

The previous prime is 774497687027. The next prime is 774497687123. The reversal of 774497687040 is 40786794477.

774497687040 is a `hidden beast` number, since 7 + 7 + 449 + 76 + 87 + 0 + 40 = 666.

It is a tau number, because it is divible by the number of its divisors (3840).

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 383 ways as a sum of consecutive naturals, for example, 20932369902 + ... + 20932369938.

It is an arithmetic number, because the mean of its divisors is an integer number (1018809792).

Almost surely, 2^774497687040 is an apocalyptic number.

774497687040 is a gapful number since it is divisible by the number (70) 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 774497687040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1956114800640).

774497687040 is an abundant number, since it is smaller than the sum of its proper divisors (3137731914240).

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

774497687040 is a wasteful number, since it uses less digits than its factorization.

774497687040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135 (or 107 counting only the distinct ones).

The product of its (nonzero) digits is 66382848, while the sum is 63.

The spelling of 774497687040 in words is "seven hundred seventy-four billion, four hundred ninety-seven million, six hundred eighty-seven thousand, forty".