84989157841 has 9 divisors (see below), whose sum is σ = 98867312649. Its totient is φ = 72846100404.

The previous prime is 84989157823. The next prime is 84989157889. The reversal of 84989157841 is 14875198948.

The square root of 84989157841 is 291529.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 84989157841 - 2⁹ = 84989157329 is a prime.

It is not an unprimeable number, because it can be changed into a prime (84989157941) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2019880 + ... + 2061526.

It is an arithmetic number, because the mean of its divisors is an integer number (10985256961).

Almost surely, 2^84989157841 is an apocalyptic number.

84989157841 is the 291529-th square number.

84989157841 is the 145765-th centered octagonal number.

It is an amenable number.

84989157841 is a deficient number, since it is larger than the sum of its proper divisors (13878154808).

84989157841 is an frugal number, since it uses more digits than its factorization.

84989157841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83308 (or 41654 counting only the distinct ones).

The product of its digits is 23224320, while the sum is 64.

Multiplying 84989157841 by its sum of digits (64), we get a square (5439306101824 = 2332232²).

The spelling of 84989157841 in words is "eighty-four billion, nine hundred eighty-nine million, one hundred fifty-seven thousand, eight hundred forty-one".