1641008078 has 4 divisors (see below), whose sum is σ = 2461512120. Its totient is φ = 820504038.

The previous prime is 1641008069. The next prime is 1641008107. The reversal of 1641008078 is 8708001461.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8708001461 = 541 ⋅16096121.

It is a super-2 number, since 2×1641008078² = 5385815024122508168, which contains 22 as substring.

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 as a sum of consecutive naturals, namely, 410252018 + ... + 410252021.

It is an arithmetic number, because the mean of its divisors is an integer number (615378030).

Almost surely, 2^1641008078 is an apocalyptic number.

1641008078 is a deficient number, since it is larger than the sum of its proper divisors (820504042).

1641008078 is an equidigital number, since it uses as much as digits as its factorization.

1641008078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 820504041.

The product of its (nonzero) digits is 10752, while the sum is 35.

The square root of 1641008078 is about 40509.3579065381. The cubic root of 1641008078 is about 1179.5152844954.

The spelling of 1641008078 in words is "one billion, six hundred forty-one million, eight thousand, seventy-eight".