6899426155440 has 240 divisors, whose sum is σ = 28517628379968. Its totient is φ = 1455703087104.

The previous prime is 6899426155387. The next prime is 6899426155469. The reversal of 6899426155440 is 445516249986.

6899426155440 is a `hidden beast` number, since 6 + 8 + 9 + 9 + 4 + 2 + 615 + 5 + 4 + 4 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (240).

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

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 52585779 + ... + 52716818.

Almost surely, 2^{6899426155440} is an apocalyptic number.

6899426155440 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6899426155440 is an abundant number, since it is smaller than the sum of its proper divisors (21618202224528).

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

6899426155440 is a wasteful number, since it uses less digits than its factorization.

6899426155440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105302636 (or 105302627 counting only the distinct ones).

The product of its (nonzero) digits is 74649600, while the sum is 63.

The spelling of 6899426155440 in words is "six trillion, eight hundred ninety-nine billion, four hundred twenty-six million, one hundred fifty-five thousand, four hundred forty".