695406921840 has 560 divisors, whose sum is σ = 2575284733728. Its totient is φ = 173951483904.

The previous prime is 695406921809. The next prime is 695406921953. The reversal of 695406921840 is 48129604596.

695406921840 is a `hidden beast` number, since 6 + 9 + 540 + 6 + 92 + 1 + 8 + 4 + 0 = 666.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

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

It is a congruent number.

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 111 ways as a sum of consecutive naturals, for example, 349977327 + ... + 349979313.

Almost surely, 2^695406921840 is an apocalyptic number.

695406921840 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 695406921840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1287642366864).

695406921840 is an abundant number, since it is smaller than the sum of its proper divisors (1879877811888).

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

695406921840 is a wasteful number, since it uses less digits than its factorization.

695406921840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2388 (or 2367 counting only the distinct ones).

The product of its (nonzero) digits is 3732480, while the sum is 54.

The spelling of 695406921840 in words is "six hundred ninety-five billion, four hundred six million, nine hundred twenty-one thousand, eight hundred forty".