89715993551 has 2 divisors, whose sum is σ = 89715993552. Its totient is φ = 89715993550.

The previous prime is 89715993539. The next prime is 89715993559. The reversal of 89715993551 is 15539951798.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-89715993551 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (89715993559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44857996775 + 44857996776.

It is an arithmetic number, because the mean of its divisors is an integer number (44857996776).

Almost surely, 2^89715993551 is an apocalyptic number.

89715993551 is a deficient number, since it is larger than the sum of its proper divisors (1).

89715993551 is an equidigital number, since it uses as much as digits as its factorization.

89715993551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15309000, while the sum is 62.

The spelling of 89715993551 in words is "eighty-nine billion, seven hundred fifteen million, nine hundred ninety-three thousand, five hundred fifty-one".